diff --git a/src/emu/cpu/tms9900/ti990_10.c b/src/emu/cpu/tms9900/ti990_10.c
index 0310bd634b6..dd12c0b6735 100644
--- a/src/emu/cpu/tms9900/ti990_10.c
+++ b/src/emu/cpu/tms9900/ti990_10.c
@@ -46,9 +46,9 @@ ti990_10_device::ti990_10_device(const machine_config &mconfig, const char *tag,
 		m_program_config("program", ENDIANNESS_BIG, 16, 16),
 		m_io_config("cru", ENDIANNESS_BIG, 8, 12),
 		m_prgspace(NULL),
-		m_cru(NULL),
-		m_prgaddr_mask((1<<16)-1),
-		m_cruaddr_mask((1<<12)-1)
+		m_cru(NULL)
+		//m_prgaddr_mask((1<<16)-1),
+		//m_cruaddr_mask((1<<12)-1)
 {
 }
 
diff --git a/src/emu/cpu/tms9900/ti990_10.h b/src/emu/cpu/tms9900/ti990_10.h
index 042dfa0479b..91c0493717d 100644
--- a/src/emu/cpu/tms9900/ti990_10.h
+++ b/src/emu/cpu/tms9900/ti990_10.h
@@ -67,8 +67,8 @@ protected:
 
 private:
 	// Max address
-	const UINT16  m_prgaddr_mask;
-	const UINT16  m_cruaddr_mask;
+	//UINT16  m_prgaddr_mask;
+	//UINT16  m_cruaddr_mask;
 
 	UINT16  m_state_any;
 };