diff --git a/src/tools/make_etags b/src/tools/make_etags
index 94b9597aa4..e81bdb6f9a 100755
--- a/src/tools/make_etags
+++ b/src/tools/make_etags
@@ -2,7 +2,7 @@
 trap "rm -f /tmp/$$" 0 1 2 3 15
 rm -f ./TAGS
 find `pwd`/ -type f -name '*.[chyl]' -print | \
-  xargs etags --append --output=TAGS
+  xargs etags --append -o TAGS
 
 find . -type d -print | \
 while read DIR; do