diff --git a/src/lnav_util.cc b/src/lnav_util.cc
index 5f00e897..0dd3f305 100644
--- a/src/lnav_util.cc
+++ b/src/lnav_util.cc
@@ -36,6 +36,7 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <ctype.h>
+#include <stdarg.h>
 
 #include <fstream>