diff --git a/gcc/config/rs6000/constraints.md b/gcc/config/rs6000/constraints.md
index 561ce9797af..c8cff1a3038 100644
--- a/gcc/config/rs6000/constraints.md
+++ b/gcc/config/rs6000/constraints.md
@@ -17,7 +17,7 @@
 ;; along with GCC; see the file COPYING3.  If not see
 ;; <http://www.gnu.org/licenses/>.
 
-;; Available constraint letters: e k q t u A B C D S T
+;; Available constraint letters: k q t u A B C D S T
 
 ;; Register constraints