diff --git a/programs/develop/mtdbg/gui.inc b/programs/develop/mtdbg/gui.inc
index 3654c0c8fd..79a4dc0206 100644
--- a/programs/develop/mtdbg/gui.inc
+++ b/programs/develop/mtdbg/gui.inc
@@ -170,12 +170,12 @@ keypressed:
         cmp     al, 0xB1
         jz      .down
         cmp     al, 0xB2
-        jz      .up
-        cmp     ah, 0x41
-        jz      F7
-        cmp     ah, 0x42
-        jz      F8
-        cmp     [cmdline_len], cmdline_width
+        jz      .up
+        cmp     ah, 0x41
+        jz      F7
+        cmp     ah, 0x42
+        jz      F8
+        cmp     [cmdline_len], cmdline_width
         jae     waitevent
         push    eax
         call    clear_cmdline_end
@@ -1527,7 +1527,7 @@ draw_window:
         mcall   12, 1
 
     ; define window
-        mcall   0, wnd_x_size, wnd_y_size, (COLOR_BG_NORMAL or 0x54000000), caption_str
+        mcall   0, wnd_x_size, wnd_y_size, (COLOR_BG_NORMAL or 0x54000000), , caption_str
 
     ; clear unused areas
         ; get window skin height