diff --git a/reactos/lib/sdk/crt/misc/assert.c b/reactos/lib/sdk/crt/misc/assert.c
index f656976da1d..c0f4d8b5590 100644
--- a/reactos/lib/sdk/crt/misc/assert.c
+++ b/reactos/lib/sdk/crt/misc/assert.c
@@ -8,7 +8,7 @@
 /*
  * @implemented
  */
-void _assert(const char *msg, const char *file, int line)
+void _assert(const char *msg, const char *file, unsigned line)
 {
   /* Assertion failed at foo.c line 45: x<y */
   fprintf(stderr, "Assertion failed at %s line %d: %s\n", file, line, msg);