diff --git a/src/cor/core.h b/src/cor/core.h
index 03d7980..067979a 100644
--- a/src/cor/core.h
+++ b/src/cor/core.h
@@ -22,6 +22,7 @@
 #define CMC_CORE_H
 
 #include <inttypes.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>