diff --git a/Source/Invocation.m b/Source/Invocation.m
index 16b620561..d67e8ad0c 100644
--- a/Source/Invocation.m
+++ b/Source/Invocation.m
@@ -22,6 +22,7 @@
 */ 
 
 #include <config.h>
+#include <mframe.h>
 #include <base/preface.h>
 #include <base/Invocation.h>
 #include <Foundation/DistributedObjects.h>