1 files changed, 2 insertions, 1 deletions
diff --git a/src/extension/timer.h b/src/extension/timer.h
index 33b9829e9..b257c770a 100644
--- a/src/extension/timer.h
+++ b/src/extension/timer.h
@@ -16,11 +16,12 @@
 #include <stddef.h>
 #include <sigc++/sigc++.h>
 #include <glibmm/timeval.h>
-#include "extension-forward.h"
 
 namespace Inkscape {
 namespace Extension {
 
+class Extension;
+
 class ExpirationTimer {
     /** \brief Circularly linked list of all timers */
     static ExpirationTimer * timer_list;