diff --git a/Makefile b/Makefile
index a110964..814f98b 100644
--- a/Makefile
+++ b/Makefile
@@ -1195,6 +1195,8 @@
 FIP_BL2_ARGS := tb-fw
 endif
 
+BL2_SOURCES := $(sort ${BL2_SOURCES})
+
 $(if ${BL2}, $(eval $(call TOOL_ADD_IMG,bl2,--${FIP_BL2_ARGS})),\
 	$(eval $(call MAKE_BL,bl2,${FIP_BL2_ARGS})))
 endif