diff --git a/users/ishtob/rules.mk b/users/ishtob/rules.mk
index d19e952667e..909502b50ac 100755
--- a/users/ishtob/rules.mk
+++ b/users/ishtob/rules.mk
@@ -1,5 +1,5 @@
 SRC += ishtob.c
-ifneq ($(wildcard $(USER_PATH)/macros_private.c),"")
+ifneq ("$(wildcard $(USER_PATH)/macros_private.c)","")
   SRC += macros_private.c
 endif
 ifeq ($(strip $(NO_SECRETS)), yes)