diff --git a/z21emu/atmega32_detect/gleiserkennung-v4.c b/z21emu/atmega32_detect/gleiserkennung-v4.c
index 5d124f3..dd49451 100644
--- a/z21emu/atmega32_detect/gleiserkennung-v4.c
+++ b/z21emu/atmega32_detect/gleiserkennung-v4.c
@@ -200,14 +200,14 @@ int main( void ) {
     	offdelay = i2c_system[I2C_SREG_DIOFFDELAY] << 8;
 
 		//  S1 - S8
-    	i = 0; if (!(PINC & (1 << 0))) cnt[i] = offdelay;
-    	i++; if (!(PINC & (1 << 1))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 2))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 3))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 4))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 5))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 6))) cnt[i] = offdelay;
-		i++; if (!(PINC & (1 << 7))) cnt[i] = offdelay;
+    	i = 0; if (!(PINB & (1 << 0))) cnt[i] = offdelay;
+    	i++; if (!(PINB & (1 << 1))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 2))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 3))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 4))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 5))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 6))) cnt[i] = offdelay;
+		i++; if (!(PINB & (1 << 7))) cnt[i] = offdelay;
 
 		//  S9 - S16
 		i++; if (!(PINA & (1 << 0))) cnt[i] = offdelay;