diff --git a/debian/xsfbs/xsfbs.mk b/debian/xsfbs/xsfbs.mk
index cfc5496..0343aec 100755
--- a/debian/xsfbs/xsfbs.mk
+++ b/debian/xsfbs/xsfbs.mk
@@ -366,7 +366,7 @@ endif
 
 .PHONY: serverabi
 serverabi:
-ifeq ($(SERVERABI),)
+ifeq ($(SERVERMINVERS),)
 	@echo error: xserver-xorg-dev needs to be installed
 	@exit 1
 else