diff --git a/include/android/asset_manager.h b/include/android/asset_manager.h
index beb6549..7ef3ecb 100644
--- a/include/android/asset_manager.h
+++ b/include/android/asset_manager.h
@@ -27,6 +27,7 @@
 #define ANDROID_ASSET_MANAGER_H
 
 #include <sys/cdefs.h>
+#include <sys/types.h>
 
 #ifdef __cplusplus
 extern "C" {