diff --git a/src/pacman/util.h b/src/pacman/util.h
index d41b2ca0..62812441 100644
--- a/src/pacman/util.h
+++ b/src/pacman/util.h
@@ -22,6 +22,7 @@
 #define _PM_UTIL_H
 
 #include <stdlib.h>
+#include <stdarg.h>
 #include <string.h>
 #include <libintl.h> /* here so it doesn't need to be included elsewhere */