diff --git a/dkarm-eabi/rules/3ds_rules b/dkarm-eabi/rules/3ds_rules
index f841b77..33726f5 100644
--- a/dkarm-eabi/rules/3ds_rules
+++ b/dkarm-eabi/rules/3ds_rules
@@ -6,7 +6,7 @@ include $(DEVKITARM)/base_rules
 
 PORTLIBS	:=	$(PORTLIBS_PATH)/armv6k $(PORTLIBS_PATH)/3ds
 
-CTRULIB	:=	$(DEVKITPRO)/libctru
+CTRULIB	?=	$(DEVKITPRO)/libctru
 
 ifeq ($(strip $(APP_TITLE)),)
 APP_TITLE	:=	$(notdir $(OUTPUT))