diff --git a/Tests/LibC/TestWchar.cpp b/Tests/LibC/TestWchar.cpp
index ecde6cb677..05c4f24bb6 100644
--- a/Tests/LibC/TestWchar.cpp
+++ b/Tests/LibC/TestWchar.cpp
@@ -7,6 +7,7 @@
 #include <LibTest/TestCase.h>
 
 #include <errno.h>
+#include <limits.h>
 #include <string.h>
 #include <wchar.h>