diff --git a/src/mame/igs/igs_m027.cpp b/src/mame/igs/igs_m027.cpp
index 243def19386..6997c01e860 100644
--- a/src/mame/igs/igs_m027.cpp
+++ b/src/mame/igs/igs_m027.cpp
@@ -749,6 +749,7 @@ INPUT_PORTS_START( jking02 )
 INPUT_PORTS_END
 
 INPUT_PORTS_START( tct2p )
+	// uses the kan/pon/chi/reach/ron buttons as the main controls in mahjong panel mode
 	IGS_MAHJONG_MATRIX_CONDITIONAL("DSW2", 0x01, 0x00)
 
 	PORT_START("PORTB")
diff --git a/src/mame/snk/snk.cpp b/src/mame/snk/snk.cpp
index c0dd8316843..b9ed04fb0dc 100644
--- a/src/mame/snk/snk.cpp
+++ b/src/mame/snk/snk.cpp
@@ -1104,14 +1104,14 @@ template <bool Small, unsigned Num>
 uint8_t bermudat_state::turbofront_check8()
 {
 	return
-		(turbofront_check(Small, (num * 8) + 0) << 0) |
-		(turbofront_check(Small, (num * 8) + 1) << 1) |
-		(turbofront_check(Small, (num * 8) + 2) << 2) |
-		(turbofront_check(Small, (num * 8) + 3) << 3) |
-		(turbofront_check(Small, (num * 8) + 4) << 4) |
-		(turbofront_check(Small, (num * 8) + 5) << 5) |
-		(turbofront_check(Small, (num * 8) + 6) << 6) |
-		(turbofront_check(Small, (num * 8) + 7) << 7);
+		(turbofront_check(Small, (Num * 8) + 0) << 0) |
+		(turbofront_check(Small, (Num * 8) + 1) << 1) |
+		(turbofront_check(Small, (Num * 8) + 2) << 2) |
+		(turbofront_check(Small, (Num * 8) + 3) << 3) |
+		(turbofront_check(Small, (Num * 8) + 4) << 4) |
+		(turbofront_check(Small, (Num * 8) + 5) << 5) |
+		(turbofront_check(Small, (Num * 8) + 6) << 6) |
+		(turbofront_check(Small, (Num * 8) + 7) << 7);
 }