diff --git a/src/devices/machine/i8255.cpp b/src/devices/machine/i8255.cpp
index b968bd67f30..b1bae643ee9 100644
--- a/src/devices/machine/i8255.cpp
+++ b/src/devices/machine/i8255.cpp
@@ -925,8 +925,6 @@ WRITE_LINE_MEMBER( i8255_device::pc4_w )
 			// set input buffer flag
 			set_ibf(PORT_A, 1);
 		}
-
-		set_pc_bit(4, state);
 	}
 }
 
@@ -943,8 +941,6 @@ WRITE_LINE_MEMBER( i8255_device::pc6_w )
 			// clear output buffer flag
 			set_obf(PORT_A, 1);
 		}
-
-		set_pc_bit(6, state);
 	}
 }