1 files changed, 4 insertions, 0 deletions
diff --git a/Config.mk b/Config.mk
index e346c57a24..bc28b9eede 100644
--- a/Config.mk
+++ b/Config.mk
@@ -1,5 +1,9 @@
 # -*- mode: Makefile; -*-
 
+ifeq ($(filter /%,$(XEN_ROOT)),)
+$(error XEN_ROOT must be absolute)
+endif
+
 -include $(XEN_ROOT)/.config
 
 # A debug build of Xen and tools?