diff --git a/crypto_sign/rainbowIIIc-classic/clean/sign.c b/crypto_sign/rainbowIIIc-classic/clean/sign.c
index e724420c..4d7cd1e1 100644
--- a/crypto_sign/rainbowIIIc-classic/clean/sign.c
+++ b/crypto_sign/rainbowIIIc-classic/clean/sign.c
@@ -44,7 +44,7 @@ int PQCLEAN_RAINBOWIIICCLASSIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *
         rc = PQCLEAN_RAINBOWIIICCLASSIC_CLEAN_rainbow_verify(digest, sm + mlen[0], (const pk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowIIIc-cyclic-compressed/clean/sign.c b/crypto_sign/rainbowIIIc-cyclic-compressed/clean/sign.c
index 1dcc20d2..8e83a52c 100644
--- a/crypto_sign/rainbowIIIc-cyclic-compressed/clean/sign.c
+++ b/crypto_sign/rainbowIIIc-cyclic-compressed/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWIIICCYCLICCOMPRESSED_CLEAN_crypto_sign_open(unsigned char *m,
         rc = PQCLEAN_RAINBOWIIICCYCLICCOMPRESSED_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowIIIc-cyclic/clean/sign.c b/crypto_sign/rainbowIIIc-cyclic/clean/sign.c
index 0f558c48..72a6ca39 100644
--- a/crypto_sign/rainbowIIIc-cyclic/clean/sign.c
+++ b/crypto_sign/rainbowIIIc-cyclic/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWIIICCYCLIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *m
         rc = PQCLEAN_RAINBOWIIICCYCLIC_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowIa-classic/clean/sign.c b/crypto_sign/rainbowIa-classic/clean/sign.c
index 08405878..ad0647a9 100644
--- a/crypto_sign/rainbowIa-classic/clean/sign.c
+++ b/crypto_sign/rainbowIa-classic/clean/sign.c
@@ -44,7 +44,7 @@ int PQCLEAN_RAINBOWIACLASSIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *ml
         rc = PQCLEAN_RAINBOWIACLASSIC_CLEAN_rainbow_verify(digest, sm + mlen[0], (const pk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowIa-cyclic-compressed/clean/sign.c b/crypto_sign/rainbowIa-cyclic-compressed/clean/sign.c
index d0687aa3..3dc5694f 100644
--- a/crypto_sign/rainbowIa-cyclic-compressed/clean/sign.c
+++ b/crypto_sign/rainbowIa-cyclic-compressed/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWIACYCLICCOMPRESSED_CLEAN_crypto_sign_open(unsigned char *m, s
         rc = PQCLEAN_RAINBOWIACYCLICCOMPRESSED_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowIa-cyclic/clean/sign.c b/crypto_sign/rainbowIa-cyclic/clean/sign.c
index cd5c2809..e0a2abc4 100644
--- a/crypto_sign/rainbowIa-cyclic/clean/sign.c
+++ b/crypto_sign/rainbowIa-cyclic/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWIACYCLIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *mle
         rc = PQCLEAN_RAINBOWIACYCLIC_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowVc-classic/clean/sign.c b/crypto_sign/rainbowVc-classic/clean/sign.c
index 3422f1b9..3c0e56a0 100644
--- a/crypto_sign/rainbowVc-classic/clean/sign.c
+++ b/crypto_sign/rainbowVc-classic/clean/sign.c
@@ -44,7 +44,7 @@ int PQCLEAN_RAINBOWVCCLASSIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *ml
         rc = PQCLEAN_RAINBOWVCCLASSIC_CLEAN_rainbow_verify(digest, sm + mlen[0], (const pk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowVc-cyclic-compressed/clean/sign.c b/crypto_sign/rainbowVc-cyclic-compressed/clean/sign.c
index 99f483cb..83241187 100644
--- a/crypto_sign/rainbowVc-cyclic-compressed/clean/sign.c
+++ b/crypto_sign/rainbowVc-cyclic-compressed/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWVCCYCLICCOMPRESSED_CLEAN_crypto_sign_open(unsigned char *m, s
         rc = PQCLEAN_RAINBOWVCCYCLICCOMPRESSED_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);
diff --git a/crypto_sign/rainbowVc-cyclic/clean/sign.c b/crypto_sign/rainbowVc-cyclic/clean/sign.c
index 9b9924d7..41a3d999 100644
--- a/crypto_sign/rainbowVc-cyclic/clean/sign.c
+++ b/crypto_sign/rainbowVc-cyclic/clean/sign.c
@@ -46,7 +46,7 @@ int PQCLEAN_RAINBOWVCCYCLIC_CLEAN_crypto_sign_open(unsigned char *m, size_t *mle
         rc = PQCLEAN_RAINBOWVCCYCLIC_CLEAN_rainbow_verify_cyclic(digest, sm + mlen[0], (const cpk_t *)pk);
     }
     if (!rc) {
-        memcpy(m, sm, smlen - _SIGNATURE_BYTE);
+        memmove(m, sm, smlen - _SIGNATURE_BYTE);
     } else { // bad signature
         *mlen = (size_t) -1;
         memset(m, 0, smlen);