diff --git a/Makefile b/Makefile
index 5d3c764e..92f29a4a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,9 @@
 #Makefile at top of application tree
+# "#!" marks lines that can be uncommented.
 TOP = .
 include $(TOP)/configure/CONFIG
 DIRS := $(DIRS) $(filter-out $(DIRS), configure)
 DIRS := $(DIRS) $(filter-out $(DIRS), motorApp)
-#DIRS := $(DIRS) $(filter-out $(DIRS), motorExApp)
-#DIRS := $(DIRS) $(filter-out $(DIRS), iocBoot)
+#!DIRS := $(DIRS) $(filter-out $(DIRS), motorExApp)
+#!DIRS := $(DIRS) $(filter-out $(DIRS), iocBoot)
 include $(TOP)/configure/RULES_TOP