diff --git a/src/kem/sike/includes/sike/sike.h b/src/kem/sike/includes/sike/sike.h
index 09d1e580..e71cde57 100644
--- a/src/kem/sike/includes/sike/sike.h
+++ b/src/kem/sike/includes/sike/sike.h
@@ -3,6 +3,7 @@
 
 #include <stdint.h>
 #include <string.h>
+#include "randombytes.h"
 
 /* SIKE
  *
@@ -55,7 +56,8 @@
 #define PQCLEAN_SIKE434_CLEAN_CRYPTO_ALGNAME         "SIKE/p434"
 
 static inline int PQCLEAN_SIKE434_CLEAN_crypto_kem_keypair(uint8_t *pk, uint8_t *sk) {
-	SIKE_keypair(sk, pk);
+	randombytes(sk, SIKE_MSG_BYTESZ);
+	SIKE_keypair(sk+SIKE_MSG_BYTESZ, pk);
 	memcpy(&sk[SIKE_PRV_BYTESZ+SIKE_MSG_BYTESZ], pk, SIKE_PUB_BYTESZ);
 	return 1;
 }