diff --git a/Makefile b/Makefile
index 87f9fc7..5fc16b3 100644
--- a/Makefile
+++ b/Makefile
@@ -2444,7 +2444,7 @@
 cmd_genenv = \
 	$(objtree)/tools/printinitialenv | \
 	sed -e '/^\s*$$/d' | \
-	sort --field-separator='=' -k1,1 --stable -o $@
+	sort -t '=' -k 1,1 -s -o $@
 
 u-boot-initial-env: $(env_h) FORCE
 	$(Q)$(MAKE) $(build)=tools $(objtree)/tools/printinitialenv