diff --git a/cfg/check_features.mk b/cfg/check_features.mk
index d1b81cf..56d2210 100644
--- a/cfg/check_features.mk
+++ b/cfg/check_features.mk
@@ -6,19 +6,19 @@ ifneq ($(CHECK_X11_LIBS), error)
 endif
 
 # Check if we want build audio support
-AUDIO = $(shell if [ -z "$(DISABLE_AV)" ] || [ "$(DISABLE_AV)" == "0" ] ; then echo enabled ; else echo disabled ; fi)
+AUDIO = $(shell if [ -z "$(DISABLE_AV)" ] || [ "$(DISABLE_AV)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(AUDIO), disabled)
 	-include $(CFG_DIR)/av.mk
 endif
 
 # Check if we want build sound notifications support
-SND_NOTIFY = $(shell if [ -z "$(DISABLE_SOUND_NOTIFY)" ] || [ "$(DISABLE_SOUND_NOTIFY)" == "0" ] ; then echo enabled ; else echo disabled ; fi)
+SND_NOTIFY = $(shell if [ -z "$(DISABLE_SOUND_NOTIFY)" ] || [ "$(DISABLE_SOUND_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(SND_NOTIFY), disabled)
 	-include $(CFG_DIR)/sound_notifications.mk
 endif
 
 # Check if we want build desktop notifications support
-DESK_NOTIFY = $(shell if [ -z "$(DISABLE_DESKTOP_NOTIFY)" ] || [ "$(DISABLE_DESKTOP_NOTIFY)" == "0" ] ; then echo enabled ; else echo disabled ; fi)
+DESK_NOTIFY = $(shell if [ -z "$(DISABLE_DESKTOP_NOTIFY)" ] || [ "$(DISABLE_DESKTOP_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(DESK_NOTIFY), disabled)
 	-include $(CFG_DIR)/desktop_notifications.mk
 endif