diff --git a/src/apk_defines.h b/src/apk_defines.h
index 00e9ea8..1cd8b6c 100644
--- a/src/apk_defines.h
+++ b/src/apk_defines.h
@@ -13,6 +13,7 @@
 #define APK_DEFINES_H
 
 #include <endian.h>
+#include <stdint.h>
 #include <string.h>
 #include <time.h>