diff --git a/src/command/command.c b/src/command/command.c
index 375d1b26..76890725 100644
--- a/src/command/command.c
+++ b/src/command/command.c
@@ -561,14 +561,16 @@ static struct cmd_t command_defs[] =
             CMD_TAG_GROUPCHAT)
         CMD_SYN(
             "/subject set <subject>",
+            "/subject prepend <text>",
             "/subject append <text>",
             "/subject clear")
         CMD_DESC(
-            "Set, append to, or clear room subject.")
+            "Set, modify, or clear room subject.")
         CMD_ARGS(
-            { "set <subject>", "Set the room subject." },
-            { "append <text>", "Append text to the current room subject, use double quotes if a preceeding space is needed." },
-            { "clear",         "Clear the room subject." })
+            { "set <subject>",  "Set the room subject." },
+            { "prepend <text>", "Prepend text to the current room subject, use double quotes if a trailing space is needed." },
+            { "append <text>",  "Append text to the current room subject, use double quotes if a preceeding space is needed." },
+            { "clear",          "Clear the room subject." })
         CMD_NOEXAMPLES
     },
 
@@ -2137,6 +2139,7 @@ cmd_init(void)
 
     subject_ac = autocomplete_new();
     autocomplete_add(subject_ac, "set");
+    autocomplete_add(subject_ac, "prepend");
     autocomplete_add(subject_ac, "append");
     autocomplete_add(subject_ac, "clear");
 
diff --git a/src/command/commands.c b/src/command/commands.c
index f17fec42..c8a516cd 100644
--- a/src/command/commands.c
+++ b/src/command/commands.c
@@ -2851,6 +2851,23 @@ cmd_subject(ProfWin *window, const char *const command, gchar **args)
         return TRUE;
     }
 
+    if (g_strcmp0(args[0], "prepend") == 0) {
+        if (args[1]) {
+            char *old_subject = muc_subject(mucwin->roomjid);
+            if (old_subject) {
+                GString *new_subject = g_string_new(args[1]);
+                g_string_append(new_subject, old_subject);
+                message_send_groupchat_subject(mucwin->roomjid, new_subject->str);
+                g_string_free(new_subject, TRUE);
+            } else {
+                win_vprint(window, '!', 0, NULL, NO_EOL, THEME_ROOMINFO, "", "Room does not have a subject, use /subject set <subject>");
+            }
+        } else {
+            cons_bad_cmd_usage(command);
+        }
+        return TRUE;
+    }
+
     if (g_strcmp0(args[0], "append") == 0) {
         if (args[1]) {
             char *old_subject = muc_subject(mucwin->roomjid);