diff --git a/InstructionSets/PowerPC/Instruction.hpp b/InstructionSets/PowerPC/Instruction.hpp
index 221d70813..4b67c85b1 100644
--- a/InstructionSets/PowerPC/Instruction.hpp
+++ b/InstructionSets/PowerPC/Instruction.hpp
@@ -540,7 +540,7 @@ struct Instruction {
 	/// Whether to compare 32-bit or 64-bit numbers [for 64-bit implementations only]; @c 0 or @c non-0.
 	uint32_t l() const	{	return opcode & 0x200000;	}
 	/// Enables setting of OV and SO in the XER; @c 0 or @c non-0.
-	uint32_t oe() const	{	return opcode & 0x800;		}
+	uint32_t oe() const	{	return opcode & 0x400;		}
 };
 
 // Sanity check on Instruction size.
diff --git a/OSBindings/Mac/Clock SignalTests/DingusdevPowerPCTests.mm b/OSBindings/Mac/Clock SignalTests/DingusdevPowerPCTests.mm
index f3e0be5c5..1a506dab5 100644
--- a/OSBindings/Mac/Clock SignalTests/DingusdevPowerPCTests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/DingusdevPowerPCTests.mm	
@@ -25,6 +25,14 @@ void AssertEqualOperationName(NSString *lhs, NSString *rhs) {
 	XCTAssertEqualObjects(lhsMapped, rhsMapped);
 }
 
+void AssertEqualOperationNameOE(NSString *lhs, Instruction instruction, NSString *rhs) {
+	XCTAssert([lhs characterAtIndex:lhs.length - 1] == 'x');
+	lhs = [lhs substringToIndex:lhs.length - 1];
+	if(instruction.oe()) lhs = [lhs stringByAppendingString:@"o"];
+	if(instruction.rc()) lhs = [lhs stringByAppendingString:@"."];
+	XCTAssertEqualObjects(lhs, rhs);
+}
+
 }
 
 @implementation DingusdevPowerPCTests
@@ -118,12 +126,12 @@ void AssertEqualOperationName(NSString *lhs, NSString *rhs) {
 
 #define ABD(x)	\
 			case Operation::x:	\
-				AssertEqualOperationName(operation, @#x);	\
+				AssertEqualOperationNameOE(@#x, instruction, operation);	\
 				[self testABDInstruction:instruction columns:columns testZero:NO];	\
 			break;
 
-//			ABD(subfc);
-//			ABD(subfc_);
+			ABD(subfcx);
+			ABD(subfx);
 
 #undef ABD