diff --git a/Processors/65816/Implementation/65816Implementation.hpp b/Processors/65816/Implementation/65816Implementation.hpp
index ff2e997ec..da436c016 100644
--- a/Processors/65816/Implementation/65816Implementation.hpp
+++ b/Processors/65816/Implementation/65816Implementation.hpp
@@ -268,7 +268,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
 			continue;
 
 			case OperationConstructDirectX:
-				data_address_ = (direct_ + x()) & 0xffff;
+				data_address_ = (instruction_buffer_.value + direct_ + x()) & 0xffff;
 				incorrect_data_address_ = (direct_ & 0xff00) + (data_address_ & 0x00ff);
 				if(!(direct_&0xff)) {
 					++next_op_;
@@ -276,7 +276,8 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
 			continue;
 
 			case OperationConstructDirectY:
-				data_address_ = (direct_ + y()) & 0xffff;
+				data_address_ = (instruction_buffer_.value + direct_ + y()) & 0xffff;
+				// TODO: given the 16-bit internal arithmetic, confirm this is the correct spurious address.
 				incorrect_data_address_ = (direct_ & 0xff00) + (data_address_ & 0x00ff);
 				if(!(direct_&0xff)) {
 					++next_op_;