diff --git a/src/plugins/projectexplorer/configtaskhandler.cpp b/src/plugins/projectexplorer/configtaskhandler.cpp
index 30c7c58b60d..a4dc2df5395 100644
--- a/src/plugins/projectexplorer/configtaskhandler.cpp
+++ b/src/plugins/projectexplorer/configtaskhandler.cpp
@@ -38,6 +38,7 @@
 
 #include <utils/qtcassert.h>
 
+using namespace ProjectExplorer;
 using namespace ProjectExplorer::Internal;
 
 ConfigTaskHandler::ConfigTaskHandler(const Task &pattern, Core::Id group, Core::Id page) :