diff --git a/winpr/include/winpr/locale.h b/winpr/include/winpr/locale.h
index 6b7d0de6e..d6bcabfe6 100644
--- a/winpr/include/winpr/locale.h
+++ b/winpr/include/winpr/locale.h
@@ -25,6 +25,9 @@
 
 #ifndef _WIN32
 
+#include <stdio.h>
+#include <stdarg.h>
+
 #define LANG_NEUTRAL					0x00
 #define LANG_INVARIANT					0x7f