diff --git a/xtrn/sbl/GNUmakefile b/xtrn/sbl/GNUmakefile
index 2689a70bf9cd575f173f0d596b850aae5af7820f..6d940c137905d5a8044f1541c30cec867696893f 100644
--- a/xtrn/sbl/GNUmakefile
+++ b/xtrn/sbl/GNUmakefile
@@ -15,14 +15,14 @@
 # Macros
 XSDK		=	../sdk
 ifndef XPDEV
- XPDEV		=	../../src/xpdev/
+ XPDEV		=	../../src/xpdev
 endif
 ifndef SBBS_SRC
- SBBS_SRC	:=	$(XPDEV)../sbbs3/
+ SBBS_SRC	:=	$(XPDEV)../sbbs3
 endif
 NEED_THREADS	:=	1
-include $(XPDEV)Common.gmake
-include $(SBBS_SRC)Common.gmake
+include $(XPDEV)/Common.gmake
+include $(SBBS_SRC)/Common.gmake
 
 ifeq ($(os),sunos)
  LDFLAGS	+=	-lsocket -lnsl -lrt