diff --git a/projects/Stacker/lib/runtime/stacker_rt.c b/projects/Stacker/lib/runtime/stacker_rt.c
index 6336b18b4df..7474898eb0c 100644
--- a/projects/Stacker/lib/runtime/stacker_rt.c
+++ b/projects/Stacker/lib/runtime/stacker_rt.c
@@ -20,6 +20,7 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <sys/types.h>
 
 extern int64_t _index_;