1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/libcrypto/evp/m_null.c b/src/lib/libcrypto/evp/m_null.c
index cb0721699d..f6f0a1d2c0 100644
--- a/src/lib/libcrypto/evp/m_null.c
+++ b/src/lib/libcrypto/evp/m_null.c
@@ -65,7 +65,7 @@
 static int init(EVP_MD_CTX *ctx)
         { return 1; }
 
-static int update(EVP_MD_CTX *ctx,const void *data,size_t count)
+static int update(EVP_MD_CTX *ctx,const void *data,unsigned long count)
         { return 1; }
 
 static int final(EVP_MD_CTX *ctx,unsigned char *md)