diff --git a/userspace/libraries/LibC/include/assert.h b/userspace/libraries/LibC/include/assert.h
index da43af84..457bb2ba 100644
--- a/userspace/libraries/LibC/include/assert.h
+++ b/userspace/libraries/LibC/include/assert.h
@@ -1,4 +1,4 @@
-#ifndef __ASSERT_H
+#ifndef _ASSERT_H
 #define _ASSERT_H 1
 
 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html