diff --git a/src/factory.h b/src/factory.h
index cec1b2d090ddca7d7f7b0cd7bd54261a3de0834b..00d2263c2657c183bd6ac1204198ece06ce4ea9e 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -374,7 +374,7 @@ inline std::string FrameFactory::getClass()
 
 #define WOLF_REGISTER_FRAME(FrameType, FrameName) \
   namespace{ const bool WOLF_UNUSED FrameName##Registered = \
-    FrameFactory::get().registerCreator(FrameType, FrameName::create); }\
+    wolf::FrameFactory::get().registerCreator(FrameType, FrameName::create); }\
 
 
 } /* namespace wolf */
diff --git a/src/sensor_factory.h b/src/sensor_factory.h
index 3e7e1aabc300d286fbf1c37373de0ba7614f75f1..abdba1e604a199b81b8a32c765c98197bdd87ff3 100644
--- a/src/sensor_factory.h
+++ b/src/sensor_factory.h
@@ -220,7 +220,7 @@ inline std::string SensorFactory::getClass()
 
 #define WOLF_REGISTER_SENSOR(SensorType, SensorName) \
   namespace{ const bool WOLF_UNUSED SensorName##Registered = \
-    SensorFactory::get().registerCreator(SensorType, SensorName::create); }\
+    wolf::SensorFactory::get().registerCreator(SensorType, SensorName::create); }\
 
 } /* namespace wolf */