diff --git a/source/textbox.c b/source/textbox.c
index fcfe8340..5228672f 100644
--- a/source/textbox.c
+++ b/source/textbox.c
@@ -405,7 +405,7 @@ int textbox_keypress ( textbox *tb, XEvent *ev )
         textbox_cursor_bkspc ( tb );
         return 1;
     }
-    else if ( ( ev->xkey.state & ControlMask ) && key == XK_Return || key == XK_KP_Enter ) {
+    else if ( ( ev->xkey.state & ControlMask ) && ( key == XK_Return || key == XK_KP_Enter) ) {
         return -2;
     }
     else if ( key == XK_Return || key == XK_KP_Enter ||