diff --git a/client/mysql.cc b/client/mysql.cc
index 87b347d5b3e..336c6bfe938 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -5198,6 +5198,9 @@ static const char *construct_prompt() {
         case 'O':
           processed_prompt.append(month_names[t->tm_mon]);
           break;
+        case 'M':
+          add_int_to_prompt(t->tm_mday);
+          break;
         case '\'':
           processed_prompt.append("'");
           break;