diff --git a/pd-mapper.c b/pd-mapper.c
index 45177ae..f5d45ee 100644
--- a/pd-mapper.c
+++ b/pd-mapper.c
@@ -36,6 +36,7 @@
 #include <fcntl.h>
 #include <libgen.h>
 #include <libqrtr.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>