diff --git a/Makefile b/Makefile
index 24c9772..52714b3 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,9 @@ DO_LOGGING := 0
 ifeq ($(strip $(DEVKITPPC)),)
 $(error "Please set DEVKITPPC in your environment. export DEVKITPPC=<path to>devkitPPC)
 endif
+ifeq ($(strip $(DEVKITPRO)),)
+$(error "Please set DEVKITPRO in your environment. export DEVKITPRO=<path to>DEVKITPRO)
+endif
 
 export PATH			:=	$(DEVKITPPC)/bin:$(PORTLIBS)/bin:$(PATH)
 export PORTLIBS		:=	$(DEVKITPRO)/portlibs/ppc