diff --git a/src/cxxTemplates/Makefile.Host b/src/cxxTemplates/Makefile.Host
index e635ace03..5dfc4d038 100644
--- a/src/cxxTemplates/Makefile.Host
+++ b/src/cxxTemplates/Makefile.Host
@@ -5,6 +5,7 @@ INC += resourceLib.h
 INC += tsDLList.h
 INC += tsSLList.h
 INC += tsMinMax.h
+INC += tsBTree.h
 
 include $(TOP)/config/RULES.Host