diff --git a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Tables.cpp b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Tables.cpp
index 44da0199d7..45c1f8b9b4 100644
--- a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Tables.cpp
+++ b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Tables.cpp
@@ -31,7 +31,7 @@ static std::array<GekkoOPTemplate, 54> primarytable =
 	{16, Interpreter::bcx,          {"bcx", OpType::Branch, FL_ENDBLOCK, 1, 0, 0, 0}},
 	{18, Interpreter::bx,           {"bx",  OpType::Branch, FL_ENDBLOCK, 1, 0, 0, 0}},
 
-	{3,  Interpreter::twi,          {"twi", OpType::System, FL_ENDBLOCK, 1, 0, 0, 0}},
+	{3,  Interpreter::twi,          {"twi", OpType::System, FL_IN_A | FL_ENDBLOCK, 1, 0, 0, 0}},
 	{17, Interpreter::sc,           {"sc",  OpType::System, FL_ENDBLOCK, 2, 0, 0, 0}},
 
 	{7,  Interpreter::mulli,        {"mulli",    OpType::Integer, FL_OUT_D | FL_IN_A, 3, 0, 0, 0}},