diff --git a/src/hardware/vga_seq.cpp b/src/hardware/vga_seq.cpp
index 63de93da..6ca66344 100644
--- a/src/hardware/vga_seq.cpp
+++ b/src/hardware/vga_seq.cpp
@@ -40,7 +40,9 @@ void write_p3c5(Bitu port,Bitu val,Bitu iolen) {
 	case 1:		/* Clocking Mode */
 		if (val!=seq(clocking_mode)) {
 			seq(clocking_mode)=val;
-			VGA_StartResize();
+			// don't resize if only the screen off bit was changed
+			if ((val&(~0x20))!=(seq(clocking_mode)&(~0x20)))
+				VGA_StartResize();
 		}
 		/* TODO Figure this out :)
 			0	If set character clocks are 8 dots wide, else 9.