diff --git a/src/excas/Makefile b/src/excas/Makefile
index 1c175d335..22bf54e6d 100644
--- a/src/excas/Makefile
+++ b/src/excas/Makefile
@@ -14,7 +14,7 @@ include $(TOP)/configure/CONFIG
 
 PROD_LIBS += $(EPICS_BASE_HOST_LIBS)
 
-SRC_DIRS += $(TOP)/templates/makeBaseApp/top/caServerApp
+SRC_DIRS += $(INSTALL_TEMPLATES)/makeBaseApp/top/caServerApp
 
 #
 # Added ws2_32 winmm user32 for the non-dll build