diff --git a/src/devices/cpu/m68000/m68000.h b/src/devices/cpu/m68000/m68000.h
index 34195070d63..808e704201f 100644
--- a/src/devices/cpu/m68000/m68000.h
+++ b/src/devices/cpu/m68000/m68000.h
@@ -561,6 +561,7 @@ protected:
 
 	inline void alu_over() {
 		m_isr = SR_V|SR_N;
+		m_aluo = 0;
 	}
 
 	inline void alu_asl(u16 a) {