diff --git a/lib/e2mmap.rb b/lib/e2mmap.rb
index 3473a1c844..b75c431f92 100644
--- a/lib/e2mmap.rb
+++ b/lib/e2mmap.rb
@@ -170,7 +170,7 @@ module Exception2MessageMapper
 
   E2MM.def_exception(E2MM,
                      :ErrNotRegisteredException,
-                     "not registerd exception(%s)")
+                     "not registered exception(%s)")
 end