diff --git a/Makefile b/Makefile
index 24d529a54..cf250addb 100644
--- a/Makefile
+++ b/Makefile
@@ -131,3 +131,5 @@ TAGS: $(C_SOURCE_FILES)
 	etags -o $@ $(C_SOURCE_FILES)
 GPATH GRTAGS GSYMS GTAGS: $(C_SOURCE_FILES)
 	ls $(C_SOURCE_FILES) | gtags -f - --gtagsconf .globalrc
+cscope.in.out cscope.po.out cscope.out: $(C_SOURCE_FILES)
+	cscope -bq -u -Iinclude -Ilibrary $(patsubst %,-I%,$(wildcard 3rdparty/*/include)) -Itests/include $(C_SOURCE_FILES)