diff --git a/src/mess/machine/gb_mbc.c b/src/mess/machine/gb_mbc.c
index ebb1de7f0cb..0e78e8453be 100644
--- a/src/mess/machine/gb_mbc.c
+++ b/src/mess/machine/gb_mbc.c
@@ -132,10 +132,6 @@ void gb_rom_mbc_device::shared_reset()
 	m_ram_bank = 0;
 	m_ram_enable = 0;
 	m_mode = 0;
-
-	has_rumble = FALSE;
-	has_timer = FALSE;
-	has_battery = FALSE;
 }
 
 //-------------------------------------------------
diff --git a/src/mess/machine/gb_rom.c b/src/mess/machine/gb_rom.c
index b4a3d56d4f3..bf062225e17 100644
--- a/src/mess/machine/gb_rom.c
+++ b/src/mess/machine/gb_rom.c
@@ -98,10 +98,6 @@ void gb_rom_device::shared_reset()
 	m_ram_bank = 0;
 	m_latch_bank = 0;
 	m_latch_bank2 = 1;
-
-	has_rumble = FALSE;
-	has_timer = FALSE;
-	has_battery = FALSE;
 }
 
 //-------------------------------------------------
@@ -142,10 +138,6 @@ void megaduck_rom_device::device_reset()
 	m_ram_bank = 0;
 	m_latch_bank = 0;
 	m_latch_bank2 = 1;
-
-	has_rumble = FALSE;
-	has_timer = FALSE;
-	has_battery = FALSE;
 }
 
 
diff --git a/src/mess/machine/gb_slot.c b/src/mess/machine/gb_slot.c
index 612a5c9f19e..ccf09a729c2 100644
--- a/src/mess/machine/gb_slot.c
+++ b/src/mess/machine/gb_slot.c
@@ -39,7 +39,10 @@ device_gb_cart_interface::device_gb_cart_interface(const machine_config &mconfig
 		m_rom(NULL),
 		m_ram(NULL),
 		m_rom_size(0),
-		m_ram_size(0)
+		m_ram_size(0),
+		has_rumble(FALSE), 
+		has_timer(FALSE), 
+		has_battery(FALSE)
 {
 }