diff --git a/prg.c b/prg.c
index 915df75..f39473f 100644
--- a/prg.c
+++ b/prg.c
@@ -12,7 +12,7 @@ const unsigned char zero_nonce[12] = {0};
 /**
  * Generates rlen output bytes using ChaCha20 with a zero nonce and counter = 0
  */
-void prg(unsigned char *r, unsigned long long rlen, const unsigned char *key, uint key_len)
+void prg(unsigned char *r, unsigned long long rlen, const unsigned char *key, unsigned int key_len)
 {  
   CRYPTO_chacha_20_keystream(r, rlen, key, zero_nonce, 0);
 }
@@ -21,7 +21,7 @@ void prg(unsigned char *r, unsigned long long rlen, const unsigned char *key, ui
  * Generates rlen output bytes using ChaCha20.
  * Nonce and counter are set depending on the address addr.
  */
-void prg_with_counter(unsigned char *r, unsigned long long rlen, const unsigned char *key, uint key_len, const unsigned char addr[16])
+void prg_with_counter(unsigned char *r, unsigned long long rlen, const unsigned char *key, unsigned int key_len, const unsigned char addr[16])
 {
   int i;
   unsigned char nonce[12];
diff --git a/prg.h b/prg.h
index 88b17e1..d95c787 100644
--- a/prg.h
+++ b/prg.h
@@ -12,11 +12,11 @@ Public domain.
  * Generates rlen output bytes using key_len-byte key and places them in r.
  * 
  */
-void prg(unsigned char *r, unsigned long long rlen, const unsigned char *key, uint key_len);
+void prg(unsigned char *r, unsigned long long rlen, const unsigned char *key, unsigned int key_len);
 
 /**
  * Generates rlen output bytes using key_len-byte key and hash address addr and places them in r.
  * 
  */
-void prg_with_counter(unsigned char *r, unsigned long long rlen, const unsigned char *key, uint key_len, const unsigned char addr[16]);
+void prg_with_counter(unsigned char *r, unsigned long long rlen, const unsigned char *key, unsigned int key_len, const unsigned char addr[16]);
 #endif
diff --git a/wots.c b/wots.c
index bbc7f87..c513413 100644
--- a/wots.c
+++ b/wots.c
@@ -57,7 +57,7 @@ static void expand_seed(unsigned char *outseeds, const unsigned char *inseed, co
  */
 static void gen_chain(unsigned char *out, const unsigned char *in, int start, int steps, const wots_params *params, const unsigned char *pub_seed, unsigned char addr[16])
 {
-  uint i,j;
+  unsigned int i,j;
   for(j=0;j<params->n;j++) 
     out[j] = in[j];
 
@@ -101,7 +101,7 @@ static void base_w(int *output, const unsigned char *input, int in_len, const wo
  */
 static void base_w_alternative(int *output, unsigned char *input, int in_len, const wots_params *params)
 {
-  uint i = 0; 
+  unsigned int i = 0;
   for(i = 0; i < in_len; i += 2)
   {
     output[i] = input[in_len - 1 - (i / 2)] >> 4;
@@ -111,7 +111,7 @@ static void base_w_alternative(int *output, unsigned char *input, int in_len, co
 
 void wots_pkgen(unsigned char *pk, const unsigned char *sk, const wots_params *params, const unsigned char *pub_seed, unsigned char addr[16])
 {
-  uint i;
+  unsigned int i;
   expand_seed(pk, sk, params);
   for(i=0;i<params->len;i++){
     SET_CHAIN_ADDRESS(addr,i);
@@ -127,7 +127,7 @@ void wots_sign(unsigned char *sig, const unsigned char *msg, const unsigned char
 {
   int basew[params->len];
   int csum = 0;
-  uint i=0;
+  unsigned int i=0;
 
   base_w(basew, msg, params->m, params);
   
@@ -166,7 +166,7 @@ void wots_pkFromSig(unsigned char *pk, const unsigned char *sig, const unsigned
 {
   int basew[params->len];
   int csum = 0;
-  uint i=0;
+  unsigned int i=0;
 
   base_w(basew, msg, params->m, params);
   
diff --git a/xmss.c b/xmss.c
index 48b0245..9384ca5 100644
--- a/xmss.c
+++ b/xmss.c
@@ -132,10 +132,10 @@ void xmssmt_set_params(xmssmt_params *params, int m, int n, int h, int d, int w)
  */
 static void l_tree(unsigned char *leaf, unsigned char *wots_pk, const xmss_params *params, const unsigned char *pub_seed, unsigned char addr[16])
 { 
-  uint l = params->wots_par.len;
-  uint n = params->n;
+  unsigned int l = params->wots_par.len;
+  unsigned int n = params->n;
   unsigned long i = 0;
-  uint height = 0;
+  unsigned int height = 0;
   
   //ADRS.setTreeHeight(0);
   SET_LTREE_TREE_HEIGHT(addr,height);
@@ -192,8 +192,8 @@ static void gen_leaf_wots(unsigned char *leaf, const unsigned char *sk_seed, con
 static void treehash(unsigned char *node, int height, int index, const unsigned char *sk_seed, const xmss_params *params, const unsigned char *pub_seed, const unsigned char addr[16])
 {
 
-  uint idx = index;
-  uint n = params->n;
+  unsigned int idx = index;
+  unsigned int n = params->n;
   // use three different addresses because at this point we use all three formats in parallel
   unsigned char ots_addr[16];
   unsigned char ltree_addr[16];
@@ -240,7 +240,7 @@ static void treehash(unsigned char *node, int height, int index, const unsigned
  */
 static void validate_authpath(unsigned char *root, const unsigned char *leaf, unsigned long leafidx, const unsigned char *authpath, const xmss_params *params, const unsigned char *pub_seed, unsigned char addr[16])
 {
-  uint n = params->n;
+  unsigned int n = params->n;
   
   int i,j;
   unsigned char buffer[2*n];
@@ -295,7 +295,7 @@ static void validate_authpath(unsigned char *root, const unsigned char *leaf, un
  */
 static void compute_authpath_wots(unsigned char *root, unsigned char *authpath, unsigned long leaf_idx, const unsigned char *sk_seed, const xmss_params *params, unsigned char *pub_seed, unsigned char addr[16])
 {
-  uint i, j, level;
+  unsigned int i, j, level;
   int n = params->n;
   int h = params->h;
   
@@ -355,8 +355,8 @@ static void compute_authpath_wots(unsigned char *root, unsigned char *authpath,
  */
 int xmss_keypair(unsigned char *pk, unsigned char *sk, xmss_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
   // Set idx = 0
   sk[0] = 0;
   sk[1] = 0;
@@ -382,8 +382,8 @@ int xmss_keypair(unsigned char *pk, unsigned char *sk, xmss_params *params)
  */
 int xmss_sign(unsigned char *sk, unsigned char *sig_msg, unsigned long long *sig_msg_len, const unsigned char *msg, unsigned long long msglen, const xmss_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
   
   // Extract SK
   unsigned long idx = ((unsigned long)sk[0] << 24) | ((unsigned long)sk[1] << 16) | ((unsigned long)sk[2] << 8) | sk[3];
@@ -474,8 +474,8 @@ int xmss_sign(unsigned char *sk, unsigned char *sig_msg, unsigned long long *sig
  */
 int xmss_sign_open(unsigned char *msg, unsigned long long *msglen, const unsigned char *sig_msg, unsigned long long sig_msg_len, const unsigned char *pk, const xmss_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
     
   unsigned long long i, m_len;
   unsigned long idx=0;
@@ -564,9 +564,9 @@ fail:
  */
 int xmssmt_keypair(unsigned char *pk, unsigned char *sk, xmssmt_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
-  uint i;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
+  unsigned int i;
   // Set idx = 0
   for (i = 0; i < params->index_len; i++){
     sk[i] = 0;
@@ -594,10 +594,10 @@ int xmssmt_keypair(unsigned char *pk, unsigned char *sk, xmssmt_params *params)
  */
 int xmssmt_sign(unsigned char *sk, unsigned char *sig_msg, unsigned long long *sig_msg_len, const unsigned char *msg, unsigned long long msglen, const xmssmt_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
-  uint tree_h = params->xmss_par.h;
-  uint idx_len = params->index_len;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
+  unsigned int tree_h = params->xmss_par.h;
+  unsigned int idx_len = params->index_len;
   unsigned long long idx_tree;
   unsigned long long idx_leaf;
   unsigned long long i;
@@ -686,7 +686,7 @@ int xmssmt_sign(unsigned char *sk, unsigned char *sig_msg, unsigned long long *s
   *sig_msg_len += tree_h*n;
   
   // Now loop over remaining layers...
-  uint j;
+  unsigned int j;
   for(j = 1; j < params->d; j++){
     // Prepare Address
     idx_leaf = (idx_tree & ((1 << tree_h)-1));
@@ -723,11 +723,11 @@ int xmssmt_sign(unsigned char *sk, unsigned char *sig_msg, unsigned long long *s
  */
 int xmssmt_sign_open(unsigned char *msg, unsigned long long *msglen, const unsigned char *sig_msg, unsigned long long sig_msg_len, const unsigned char *pk, const xmssmt_params *params)
 {
-  uint n = params->n;
-  uint m = params->m;
+  unsigned int n = params->n;
+  unsigned int m = params->m;
   
-  uint tree_h = params->xmss_par.h;
-  uint idx_len = params->index_len;
+  unsigned int tree_h = params->xmss_par.h;
+  unsigned int idx_len = params->index_len;
   unsigned long long idx_tree;
   unsigned long long idx_leaf;
   
diff --git a/xmss_commons.c b/xmss_commons.c
index 834fa5e..745de5e 100644
--- a/xmss_commons.c
+++ b/xmss_commons.c
@@ -8,7 +8,7 @@ Public domain.
 #include <stdlib.h>
 #include <stdio.h>
 
-void to_byte(unsigned char *out, uint in, int bytes)
+void to_byte(unsigned char *out, unsigned int in, int bytes)
 {
   int i;
   for(i = 0; i < bytes; i++){
diff --git a/xmss_commons.h b/xmss_commons.h
index 4b780cf..c8f0ab4 100644
--- a/xmss_commons.h
+++ b/xmss_commons.h
@@ -8,6 +8,6 @@ Public domain.
 
 #include <stdlib.h>
 
-void to_byte(unsigned char *output, uint in, int bytes);
+void to_byte(unsigned char *output, unsigned int in, int bytes);
 void hexdump(const unsigned char *a, size_t len);
 #endif
\ No newline at end of file