diff --git a/AK/StdLibExtras.h b/AK/StdLibExtras.h
index 643106aed7..836cb0a415 100644
--- a/AK/StdLibExtras.h
+++ b/AK/StdLibExtras.h
@@ -26,6 +26,8 @@
 
 #pragma once
 
+#include <AK/Assertions.h>
+
 constexpr unsigned round_up_to_power_of_two(unsigned value, unsigned power_of_two)
 {
     return ((value - 1) & ~(power_of_two - 1)) + power_of_two;