diff --git a/src/proc/mobject/session/placement-index.cpp b/src/proc/mobject/session/placement-index.cpp
index f55e6fc3a..036fff3f4 100644
--- a/src/proc/mobject/session/placement-index.cpp
+++ b/src/proc/mobject/session/placement-index.cpp
@@ -95,7 +95,7 @@ namespace session {
   
   
   /* some type shorthands */
-  typedef PlacementIndex::PlacementMO PlacementMO; 
+  typedef mobject::PlacementMO PlacementMO; 
   typedef PlacementIndex::PRef PRef;
   typedef PlacementIndex::ID ID;
   
diff --git a/src/proc/mobject/session/placement-index.hpp b/src/proc/mobject/session/placement-index.hpp
index a8df50b2a..2da6540b0 100644
--- a/src/proc/mobject/session/placement-index.hpp
+++ b/src/proc/mobject/session/placement-index.hpp
@@ -160,7 +160,6 @@ namespace session {
       
       
     public:
-      typedef Placement<MObject> PlacementMO;
       typedef PlacementRef<MObject> PRef;
       typedef PlacementMO::ID const& ID;