diff --git a/Userland/Libraries/LibC/limits.h b/Userland/Libraries/LibC/limits.h
index ac53662cb7..a53b4723ec 100644
--- a/Userland/Libraries/LibC/limits.h
+++ b/Userland/Libraries/LibC/limits.h
@@ -39,6 +39,8 @@
 
 #define NAME_MAX 255
 
+#define TTY_NAME_MAX 32
+
 #define PIPE_BUF 4096
 
 #define INT_MAX INT32_MAX