diff --git a/src/devices/cpu/e132xs/e132xsop.hxx b/src/devices/cpu/e132xs/e132xsop.hxx
index 9d55b78d233..128b25d2f43 100644
--- a/src/devices/cpu/e132xs/e132xsop.hxx
+++ b/src/devices/cpu/e132xs/e132xsop.hxx
@@ -2442,8 +2442,10 @@ void hyperstone_device::hyperstone_lddp()
 	else
 	{
 		const uint32_t srcf_code = (src_code + 1) & 0x3f;
-		m_local_regs[src_code] = READ_W(dreg);
-		m_local_regs[srcf_code] = READ_W(dreg + 4);
+		uint32_t one = READ_W(dreg);
+		uint32_t two = READ_W(dreg + 4);
+		m_local_regs[src_code] = one;
+		m_local_regs[srcf_code] = two;
 
 		// post increment the destination register if it's different from the source one
 		// and from the "next source" one