diff --git a/mozilla/network/protocol/about/mkabout.c b/mozilla/network/protocol/about/mkabout.c
index 57c90fef9fc..63c3b8f3221 100644
--- a/mozilla/network/protocol/about/mkabout.c
+++ b/mozilla/network/protocol/about/mkabout.c
@@ -14,6 +14,7 @@
 #include "cookies.h"
 #include "httpauth.h"
 #include "mkstream.h"
+#include "glhist.h"
 
 #include "abouturl.h"