diff --git a/src/plugins/cpptools/cppfunctionsfilter.cpp b/src/plugins/cpptools/cppfunctionsfilter.cpp
index 2b555e8df32..069829c3530 100644
--- a/src/plugins/cpptools/cppfunctionsfilter.cpp
+++ b/src/plugins/cpptools/cppfunctionsfilter.cpp
@@ -29,6 +29,7 @@
 
 #include "cppfunctionsfilter.h"
 
+using namespace CppTools;
 using namespace CppTools::Internal;
 
 CppFunctionsFilter::CppFunctionsFilter(CppLocatorData *locatorData)
diff --git a/src/plugins/cpptools/cpplocatorfilter.cpp b/src/plugins/cpptools/cpplocatorfilter.cpp
index 21cd38854ca..c5d5af9e517 100644
--- a/src/plugins/cpptools/cpplocatorfilter.cpp
+++ b/src/plugins/cpptools/cpplocatorfilter.cpp
@@ -32,6 +32,7 @@
 
 #include <QStringMatcher>
 
+using namespace CppTools;
 using namespace CppTools::Internal;
 
 CppLocatorFilter::CppLocatorFilter(CppLocatorData *locatorData)