diff --git a/sources/BaS.c b/sources/BaS.c
index 6f6a39d..d6117d7 100644
--- a/sources/BaS.c
+++ b/sources/BaS.c
@@ -87,7 +87,7 @@ void BaS(void)
 
 	MCF_GPT0_GMS = MCF_GPT_GMS_ICT(1) |	/* timer 0 on, video change capture on rising edge */
 			MCF_GPT_GMS_IEN |
-			MCF_GPT_GMS(1);
+			MCF_GPT_GMS_TMS(1);
 	MCF_INTC_ICR62 = 0x3f;
 
 	* (uint8_t *) 0xf0010004 = 0xfe;	/* enable int 1-7 */