1 files changed, 9 insertions, 3 deletions
diff --git a/src/extension/system.h b/src/extension/system.h
index 716539de1..170c44346 100644
--- a/src/extension/system.h
+++ b/src/extension/system.h
@@ -15,14 +15,20 @@
 #ifndef INKSCAPE_EXTENSION_SYSTEM_H__
 #define INKSCAPE_EXTENSION_SYSTEM_H__
 
-#include "document.h"
-#include "extension/extension.h"
+#include <glibmm/ustring.h>
+
+class SPDocument;
 
 namespace Inkscape {
-namespace Extension {
 
+namespace Extension {
+class Extension;
 class Print;
 
+namespace Implementation {
+class Implementation;
+}
+
 /**
  * Used to distinguish between the various invocations of the save dialogs (and thus to determine
  * the file type and save path offered in the dialog)