diff --git a/src/plugins/qt4projectmanager/makestep.cpp b/src/plugins/qt4projectmanager/makestep.cpp
index 449acfedebb..3ab3bd67fb7 100644
--- a/src/plugins/qt4projectmanager/makestep.cpp
+++ b/src/plugins/qt4projectmanager/makestep.cpp
@@ -149,7 +149,7 @@ QString MakeStep::displayName()
 
 bool MakeStep::immutable() const
 {
-    return true;
+    return false;
 }
 
 ProjectExplorer::BuildStepConfigWidget *MakeStep::createConfigWidget()
diff --git a/src/plugins/qt4projectmanager/qmakestep.cpp b/src/plugins/qt4projectmanager/qmakestep.cpp
index a83a4f7ee71..27f5a225fb4 100644
--- a/src/plugins/qt4projectmanager/qmakestep.cpp
+++ b/src/plugins/qt4projectmanager/qmakestep.cpp
@@ -175,7 +175,7 @@ ProjectExplorer::BuildStepConfigWidget *QMakeStep::createConfigWidget()
 
 bool QMakeStep::immutable() const
 {
-    return true;
+    return false;
 }