diff --git a/dumb/src/it/readstm.c b/dumb/src/it/readstm.c
index 89237d6e7..42f14e532 100644
--- a/dumb/src/it/readstm.c
+++ b/dumb/src/it/readstm.c
@@ -20,6 +20,7 @@
 // IT_STEREO... :o
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 
 #include "dumb.h"
 #include "internal/it.h"