diff --git a/ubb-vga/tstimg.c b/ubb-vga/tstimg.c
index 5a7aa8c..4b9d47c 100644
--- a/ubb-vga/tstimg.c
+++ b/ubb-vga/tstimg.c
@@ -471,6 +471,6 @@ void tstimg(void **f, int xres, int yres)
 	sprintf(buf, "LINE  %5.2f KHZ", line_freq_hz/1000);
 	text(f, xres, xres/8, yres/8+5*6, buf, 5, WHITE, 1);
 
-	sprintf(buf, "FRAME %5.2f HZ", line_freq_hz/(mode->yres+32+14));
+	sprintf(buf, "FRAME %5.2f HZ", line_freq_hz/(mode->yres+2+32+14));
 	text(f, xres, xres/8, yres/8+5*12, buf, 5, WHITE, 1);
 }