diff --git a/flash.c b/flash.c
index 493b039..7b11684 100644
--- a/flash.c
+++ b/flash.c
@@ -2,7 +2,7 @@
 #include <8052.h>
 
 #ifndef FLASH_PIN 
-#define FLASH_PIN P2_0
+#define FLASH_PIN _P2_0
 #endif
 
 #ifndef IRQFREQ
@@ -31,7 +31,7 @@ void handler() __interrupt 1
 	dec _ctr_w
 	cjne a,_ctr_w, 00001$
 
-	cpl  _P2_0
+	cpl  FLASH_PIN
 	__endasm;
 	
 	ctr_l =  TCT&0xFF;