diff --git a/Makefile b/Makefile
index f2822a2cad..98c8dc79e6 100644
--- a/Makefile
+++ b/Makefile
@@ -69,7 +69,7 @@ endif
 .NOTPARALLEL:
 
 # absolute path
-TOPDIR := $(shell pwd)
+TOPDIR := $(CURDIR)
 CONFIG_CONFIG_IN = Config.in
 CONFIG = support/kconfig
 DATE := $(shell date +%Y%m%d)