diff --git a/Makefile.config b/Makefile.config
index 535b0f342f9..24a192ad7da 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -117,7 +117,7 @@ XCODE_ISYSROOT := $(XCODE_BASE)/$(XCODE_ISYSROOT_SUFFIX)
 endif
 
 define copy_or_same_file
-  $(COPY) "$(1)" "$(2)" || diff -q "$(1)" "$(2)"
+  $(COPY) -n "$(1)" "$(2)" || diff "$(1)" "$(2)"
 endef
 
 INTERACTIVE := $(shell [ -t 0 ] && ! [ x"$$TERM" = xdumb ] && echo 1)