diff --git a/core/product_config.mk b/core/product_config.mk
index 0d4ced320..6438d51be 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -74,7 +74,7 @@ endif
 ###########################################################
 
 define find-copy-subdir-files
-$(shell find $(2) -name "$(1)" | $(SED_EXTENDED) "s:($(2)/?(.*)):\\1\\:$(3)/\\2:" | sed "s://:/:g")
+$(sort $(shell find $(2) -name "$(1)" -type f | $(SED_EXTENDED) "s:($(2)/?(.*)):\\1\\:$(3)/\\2:" | sed "s://:/:g"))
 endef
 
 # ---------------------------------------------------------------