1 files changed, 2 insertions, 0 deletions
diff --git a/parse.y b/parse.y
index fe52ee5a03..9603ec9169 100644
--- a/parse.y
+++ b/parse.y
@@ -2257,6 +2257,8 @@ parse_regx(term, paren)
 		    options |= RE_OPTION_EXTENDED;
 		    break;
 		  case 'p':	/* /p is obsolete, works as /m */
+		    yyerror("/p option is obsolete; use /m\n\tnote: /m does not change ^, $ behavior");
+		    break;
 		  case 'm':
 		    options |= RE_OPTION_MULTILINE;
 		    break;