diff --git a/src/hardware/vga_tseng.cpp b/src/hardware/vga_tseng.cpp
index cf8482fd..9e66c9f5 100644
--- a/src/hardware/vga_tseng.cpp
+++ b/src/hardware/vga_tseng.cpp
@@ -701,8 +701,10 @@ void FinishSetMode_ET3K(Bitu crtc_base, VGA_ModeExtraData* modeData) {
 	IO_Write(crtc_base,0x25);IO_Write(crtc_base+1,et4k_ver_overflow);
 
 	// Clear remaining ext CRTC registers
-	for (Bitu i=0x16; i<=0x21; i++)
-		IO_Write(crtc_base,i);IO_Write(crtc_base+1,0);
+	for (Bitu i=0x16; i<=0x21; i++) {
+		IO_Write(crtc_base,i);
+		IO_Write(crtc_base+1,0);
+	}
 	IO_Write(crtc_base,0x23);IO_Write(crtc_base+1,0);
 	IO_Write(crtc_base,0x24);IO_Write(crtc_base+1,0);
 	// Clear ext SEQ