diff --git a/src/debug.hh b/src/debug.hh
index 1600e023..e6eec9ff 100644
--- a/src/debug.hh
+++ b/src/debug.hh
@@ -10,6 +10,7 @@
 #include <cstdarg>
 #include <cstring>
 #include <string>
+#include <cerrno>
 
 #ifdef ANDROID
 #include "android/log.h"