diff --git a/srpt/Makefile b/srpt/Makefile
index 346faf1ce..dec13d21a 100644
--- a/srpt/Makefile
+++ b/srpt/Makefile
@@ -25,7 +25,7 @@ endif
 set_var = $(shell { if [ -e "$(1)" ]; then grep -v '^$(2)=' "$(1)"; fi; echo "$(2)=$(3)"; } >/tmp/$(1)-$$$$.tmp && mv /tmp/$(1)-$$$$.tmp $(1))
 
 
-SRC_FILES=$(shell $(shell pwd)/../scripts/list-source-files | grep '\.[ch]$$')
+SRC_FILES=$(wildcard */*.[ch])
 
 # The file Modules.symvers has been renamed in the 2.6.18 kernel to
 # Module.symvers. Find out which name to use by looking in $(KDIR).