diff --git a/reactos/lib/drivers/oskittcp/oskittcp/defaults.c b/reactos/lib/drivers/oskittcp/oskittcp/defaults.c
index 9708520f707..08a5fd61f41 100644
--- a/reactos/lib/drivers/oskittcp/oskittcp/defaults.c
+++ b/reactos/lib/drivers/oskittcp/oskittcp/defaults.c
@@ -194,3 +194,7 @@ int bcmp(const void *b1, const void *b2, size_t len)
 	return RtlCompareMemory(b1, b2, len);
 }
 
+int memcmp(const void *b1, const void *b2, size_t len)
+{
+	return RtlCompareMemory(b1, b2, len);
+}