diff --git a/crypto/fipsmodule/sshkdf/sshkdf.c b/crypto/fipsmodule/sshkdf/sshkdf.c
index 90e9580c47..b95cd9c6b5 100644
--- a/crypto/fipsmodule/sshkdf/sshkdf.c
+++ b/crypto/fipsmodule/sshkdf/sshkdf.c
@@ -23,7 +23,7 @@ int SSHKDF(const EVP_MD *evp_md,
 {
   EVP_MD_CTX *md = NULL;
   uint8_t digest[EVP_MAX_MD_SIZE];
-  size_t digest_size = 0;
+  unsigned int digest_size = 0;
   size_t cursize = 0;
   int ret = 0;
 
@@ -72,7 +72,7 @@ int SSHKDF(const EVP_MD *evp_md,
     goto out;
   }
 
-  if (!EVP_DigestFinal_ex(md, digest, (unsigned int *)&digest_size)) {
+  if (!EVP_DigestFinal_ex(md, digest, &digest_size)) {
     goto out;
   }