diff --git a/Userland/Libraries/LibC/limits.h b/Userland/Libraries/LibC/limits.h
index 4fde490201..58a980bde8 100644
--- a/Userland/Libraries/LibC/limits.h
+++ b/Userland/Libraries/LibC/limits.h
@@ -82,6 +82,8 @@
 
 #define LINK_MAX 4096
 
+#define TZNAME_MAX 64
+
 #ifdef __USE_POSIX
 #    include <bits/posix1_lim.h>
 #endif