diff --git a/src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c b/src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c
index e98c9f12..f43bc6bf 100644
--- a/src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c
+++ b/src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c
@@ -150,9 +150,10 @@ static inline int blake2b_init0( blake2b_state *S )
 int blake2b_init_param( blake2b_state *S, const blake2b_param *P )
 {
   size_t i;
+  const uint8_t *p;
 
   blake2b_init0( S );
-  const uint8_t *p = ( const uint8_t * )( P );
+  p = ( const uint8_t * )( P );
 
   /* IV XOR ParamBlock */
   for( i = 0; i < 8; ++i )
diff --git a/src/libsodium/crypto_generichash/blake2/ref/blake2s-ref.c b/src/libsodium/crypto_generichash/blake2/ref/blake2s-ref.c
index 03c2bb22..3103c31c 100644
--- a/src/libsodium/crypto_generichash/blake2/ref/blake2s-ref.c
+++ b/src/libsodium/crypto_generichash/blake2/ref/blake2s-ref.c
@@ -145,9 +145,10 @@ static inline int blake2s_init0( blake2s_state *S )
 int blake2s_init_param( blake2s_state *S, const blake2s_param *P )
 {
   size_t i;
+  uint32_t *p;
 
   blake2s_init0( S );
-  uint32_t *p = ( uint32_t * )( P );
+  p = ( uint32_t * )( P );
 
   /* IV XOR ParamBlock */
   for( i = 0; i < 8; ++i )