diff --git a/src/mame/audio/seibu.h b/src/mame/audio/seibu.h
index c275915f06a..8135dd9cdf2 100644
--- a/src/mame/audio/seibu.h
+++ b/src/mame/audio/seibu.h
@@ -149,12 +149,12 @@ extern const device_type SEIBU_ADPCM;
 	PORT_START("COIN")                                              \
 	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(4)      \
 	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_IMPULSE(4)      \
-	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNUSED )                    \
-	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNUSED )                    \
-	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED )                    \
-	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED )                    \
-	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED )                    \
-	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED )                     \
+	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )                     \
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )                     \
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )                     \
+	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )                     \
+	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
 
 
 #define SEIBU_SOUND_SYSTEM_CPU(freq)                                \