diff --git a/src/makeBaseApp/top/Makefile b/src/makeBaseApp/top/Makefile
index 9577d4132..bb27ec020 100644
--- a/src/makeBaseApp/top/Makefile
+++ b/src/makeBaseApp/top/Makefile
@@ -4,6 +4,6 @@ include $(TOP)/configure/CONFIG
 DIRS := $(DIRS) $(filter-out $(DIRS), configure)
 DIRS := $(DIRS) $(filter-out $(DIRS), $(wildcard *App))
 DIRS := $(DIRS) $(filter-out $(DIRS), $(wildcard *app))
-DIRS := $(DIRS) $(filter-out $(DIRS), iocBoot)
-DIRS := $(DIRS) $(filter-out $(DIRS), iocboot)
+DIRS := $(DIRS) $(filter-out $(DIRS), $(wildcard iocBoot))
+DIRS := $(DIRS) $(filter-out $(DIRS), $(wildcard iocboot))
 include $(TOP)/configure/RULES_TOP