diff --git a/src/emu/cpu/m6809/konami.c b/src/emu/cpu/m6809/konami.c
index 28adab0b508..01abfa12cbf 100644
--- a/src/emu/cpu/m6809/konami.c
+++ b/src/emu/cpu/m6809/konami.c
@@ -248,6 +248,22 @@ template<class T> T konami_cpu_device::safe_shift_right(T value, UINT32 shift)
 }
 
 
+//-------------------------------------------------
+//  safe_shift_right_unsigned
+//-------------------------------------------------
+
+template<class T> T konami_cpu_device::safe_shift_right_unsigned(T value, UINT32 shift)
+{
+	T result;
+
+	if (shift < (sizeof(T) * 8))
+		result = value >> shift;
+	else
+		result = 0;
+
+	return result;
+}
+
 //-------------------------------------------------
 //  safe_shift_left
 //-------------------------------------------------
diff --git a/src/emu/cpu/m6809/konami.h b/src/emu/cpu/m6809/konami.h
index 3b8abf0d8f0..200762ab8e7 100644
--- a/src/emu/cpu/m6809/konami.h
+++ b/src/emu/cpu/m6809/konami.h
@@ -67,6 +67,7 @@ private:
 
 	// miscellaneous
 	template<class T> T safe_shift_right(T value, UINT32 shift);
+	template<class T> T safe_shift_right_unsigned(T value, UINT32 shift);
 	template<class T> T safe_shift_left(T value, UINT32 shift);
 	void set_lines(UINT8 data);
 	void execute_one();
diff --git a/src/emu/cpu/m6809/konami.ops b/src/emu/cpu/m6809/konami.ops
index 8f642084b05..2c71759f565 100644
--- a/src/emu/cpu/m6809/konami.ops
+++ b/src/emu/cpu/m6809/konami.ops
@@ -517,7 +517,7 @@ LSRD:
 		else
 			m_cc &= ~CC_C;
 
-		m_d.w = set_flags<UINT16>(CC_NZ, safe_shift_right<UINT16>(m_d.w, m_temp.b.l));
+		m_d.w = set_flags<UINT16>(CC_NZ, safe_shift_right_unsigned<UINT16>(m_d.w, m_temp.b.l));
 	}
 	eat(1);
 	return;