diff --git a/Sources/Plasma/PubUtilLib/plPhysX/plPXPhysical.cpp b/Sources/Plasma/PubUtilLib/plPhysX/plPXPhysical.cpp
index ad8afe22..03996b27 100644
--- a/Sources/Plasma/PubUtilLib/plPhysX/plPXPhysical.cpp
+++ b/Sources/Plasma/PubUtilLib/plPhysX/plPXPhysical.cpp
@@ -611,8 +611,7 @@ hsBool plPXPhysical::HandleRefMsg(plGenRefMsg* refMsg)
 					subWorldIface = new plPXSubWorld();
 
 					// This can be simplified if/when incorporating zrax' String Theory library
-					std::string strKeyName = subSO->GetKeyName();
-					strKeyName += "_DefSubWorld";
+					std::string strKeyName = std::string(subSO->GetKeyName()) + "_DefSubWorld";
 					const char *cKeyName = strKeyName.c_str();
 
 					hsgResMgr::ResMgr()->NewKey(cKeyName,