diff --git a/src/c/main.d b/src/c/main.d
index 1b7841ea9..3c7084bf8 100644
--- a/src/c/main.d
+++ b/src/c/main.d
@@ -17,6 +17,7 @@
 /******************************** IMPORTS *****************************/
 
 #include <stdlib.h>
+#include <limits.h>
 #include "ecl.h"
 #include "internal.h"
 #ifdef TK