diff --git a/parse.y b/parse.y
index ff4fe986fe..90652686db 100644
--- a/parse.y
+++ b/parse.y
@@ -9307,7 +9307,7 @@ void
 rb_parser_fatal(struct parser_params *p, const char *fmt, ...)
 {
     va_list ap;
-    VALUE mesg = rb_str_new_cstr("internal p error: ");
+    VALUE mesg = rb_str_new_cstr("internal parser error: ");
 
     va_start(ap, fmt);
     rb_str_vcatf(mesg, fmt, ap);
@@ -9317,13 +9317,13 @@ rb_parser_fatal(struct parser_params *p, const char *fmt, ...)
 
     mesg = rb_str_new(0, 0);
     append_lex_state_name(p->lex.state, mesg);
-    compile_error(p, "p->lex.state: %"PRIsVALUE, mesg);
+    compile_error(p, "lex.state: %"PRIsVALUE, mesg);
     rb_str_resize(mesg, 0);
     append_bitstack_value(p->cond_stack, mesg);
-    compile_error(p, "p->cond_stack: %"PRIsVALUE, mesg);
+    compile_error(p, "cond_stack: %"PRIsVALUE, mesg);
     rb_str_resize(mesg, 0);
     append_bitstack_value(p->cmdarg_stack, mesg);
-    compile_error(p, "p->cmdarg_stack: %"PRIsVALUE, mesg);
+    compile_error(p, "cmdarg_stack: %"PRIsVALUE, mesg);
     if (p->debug_output == rb_stdout)
 	p->debug_output = rb_stderr;
     p->debug = TRUE;