diff --git a/Tests/LibC/TestRealpath.cpp b/Tests/LibC/TestRealpath.cpp
index 1ca9ac5540..c0fb283890 100644
--- a/Tests/LibC/TestRealpath.cpp
+++ b/Tests/LibC/TestRealpath.cpp
@@ -9,6 +9,7 @@
 #include <AK/String.h>
 #include <AK/StringBuilder.h>
 #include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>