1 files changed, 4 insertions, 4 deletions

diff --git a/io.c b/io.c
index 1a59cf2001..e07845fb31 100644
--- a/io.c
+++ b/io.c
@@ -2906,7 +2906,7 @@ rb_io_flags_mode(int flags)
 	}
 	return MODE_BINMODE("r+", "rb+");
     }
-    rb_raise(rb_eArgError, "illegal access modenum %o", flags);
+    rb_raise(rb_eArgError, "invalid access modenum %o", flags);
     return NULL;		/* not reached */
 }
 
@@ -2928,7 +2928,7 @@ rb_io_mode_flags(const char *mode)
 	break;
       default:
       error:
-	rb_raise(rb_eArgError, "illegal access mode %s", mode);
+	rb_raise(rb_eArgError, "invalid access mode %s", mode);
     }
 
     while (*m) {
@@ -2999,7 +2999,7 @@ rb_io_mode_modenum(const char *mode)
 	break;
       default:
       error:
-	rb_raise(rb_eArgError, "illegal access mode %s", mode);
+	rb_raise(rb_eArgError, "invalid access mode %s", mode);
     }
 
     while (*m) {
@@ -3046,7 +3046,7 @@ rb_io_modenum_mode(int flags)
       case O_RDWR:
 	return MODE_BINARY("r+", "rb+");
     }
-    rb_raise(rb_eArgError, "illegal access modenum %o", flags);
+    rb_raise(rb_eArgError, "invalid access modenum %o", flags);
     return NULL;		/* not reached */
 }