diff --git a/extcap.c b/extcap.c
index 5e1055c17b..316d630b8e 100644
--- a/extcap.c
+++ b/extcap.c
@@ -51,6 +51,7 @@
 
 #include "ui/iface_toolbar.h"
 
+#include <wsutil/glib-compat.h>
 #include <wsutil/file_util.h>
 #include <wsutil/filesystem.h>
 #include <wsutil/tempfile.h>