1 files changed, 1 insertions, 0 deletions
diff --git a/src/utils.h b/src/utils.h
index 75f3c92..b4baa70 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -2,6 +2,7 @@
 #define POTD_UTILS_H 1
 
 #include <stdlib.h>
+#include <sys/types.h>
 
 #ifndef SIZEOF
 #define SIZEOF(arr) (sizeof(arr)/sizeof(arr[0]))