diff --git a/code/qcommon/md5.c b/code/qcommon/md5.c
index 5cf12bb3..994083fc 100644
--- a/code/qcommon/md5.c
+++ b/code/qcommon/md5.c
@@ -253,7 +253,7 @@ static void MD5Final(struct MD5Context *ctx, unsigned char *digest)
     
     if (digest!=NULL)
 	    memcpy(digest, ctx->buf, 16);
-    memset(ctx, 0, sizeof(ctx));	/* In case it's sensitive */
+    memset(ctx, 0, sizeof(*ctx));	/* In case it's sensitive */
 }