diff --git a/src/cas/example/directoryService/directoryServer.cc b/src/cas/example/directoryService/directoryServer.cc
index a2e5bf4aa..d63b95a74 100644
--- a/src/cas/example/directoryService/directoryServer.cc
+++ b/src/cas/example/directoryService/directoryServer.cc
@@ -6,6 +6,9 @@
 #include "directoryServer.h"
 #include "tsMinMax.h"
 
+template class tsSLNode<pvEntry>;
+template class resTable<pvEntry, stringId>;
+
 const pvInfo *pvInfo::pFirst;
 
 //