diff --git a/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c b/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
index 5382cbae..dfcfa19e 100644
--- a/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
+++ b/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
@@ -1,12 +1,11 @@
 
+#include <assert.h>
 #include <limits.h>
 #include <stdint.h>
 
 #include "blake2.h"
 #include "crypto_generichash.h"
 
-#define COMPILER_ASSERT(X) (void) sizeof(char[(X) ? 1 : -1])
-
 int
 crypto_generichash_blake2b(unsigned char *out, const unsigned char *in,
                            const unsigned char *key,
@@ -18,8 +17,8 @@ crypto_generichash_blake2b(unsigned char *out, const unsigned char *in,
         inlen > UINT64_MAX) {
         return -1;
     }
-    COMPILER_ASSERT(outlen <= UINT8_MAX);
-    COMPILER_ASSERT(keylen <= UINT8_MAX);
+    assert(outlen <= UINT8_MAX);
+    assert(keylen <= UINT8_MAX);
 
     return blake2b((uint8_t *) out, in, key,
                    (uint8_t) outlen, inlen, (uint8_t) keylen);