diff --git a/Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp b/Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
index f0ef426e5f..66264aaab7 100644
--- a/Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
+++ b/Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
@@ -481,8 +481,8 @@ void Interpreter::fmsubx(UGeckoInstruction _inst)
 
 void Interpreter::fmsubsx(UGeckoInstruction _inst)
 {
-	rPS0(_inst.FD) = rPS1(_inst.FD) =
-		ForceSingle(NI_msub(rPS0(_inst.FA), rPS0(_inst.FC), rPS0(_inst.FB)));
+	double c_value = Force25Bit(rPS0(_inst.FC));
+	rPS0(_inst.FD) = rPS1(_inst.FD) = ForceSingle(NI_msub(rPS0(_inst.FA), c_value, rPS0(_inst.FB)));
 	UpdateFPRF(rPS0(_inst.FD));
 
 	if (_inst.Rc)
@@ -500,8 +500,8 @@ void Interpreter::fnmaddx(UGeckoInstruction _inst)
 
 void Interpreter::fnmaddsx(UGeckoInstruction _inst)
 {
-	rPS0(_inst.FD) = rPS1(_inst.FD) =
-		ForceSingle(-NI_madd(rPS0(_inst.FA), rPS0(_inst.FC), rPS0(_inst.FB)));
+	double c_value = Force25Bit(rPS0(_inst.FC));
+	rPS0(_inst.FD) = rPS1(_inst.FD) = ForceSingle(-NI_madd(rPS0(_inst.FA), c_value, rPS0(_inst.FB)));
 	UpdateFPRF(rPS0(_inst.FD));
 
 	if (_inst.Rc)
@@ -520,8 +520,8 @@ void Interpreter::fnmsubx(UGeckoInstruction _inst)
 // fnmsubsx does not handle QNAN properly - see NI_msub
 void Interpreter::fnmsubsx(UGeckoInstruction _inst)
 {
-	rPS0(_inst.FD) = rPS1(_inst.FD) =
-		ForceSingle(-NI_msub(rPS0(_inst.FA), rPS0(_inst.FC), rPS0(_inst.FB)));
+	double c_value = Force25Bit(rPS0(_inst.FC));
+	rPS0(_inst.FD) = rPS1(_inst.FD) = ForceSingle(-NI_msub(rPS0(_inst.FA), c_value, rPS0(_inst.FB)));
 	UpdateFPRF(rPS0(_inst.FD));
 
 	if (_inst.Rc)
diff --git a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
index 0888e79042..5f7b6580e5 100644
--- a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
+++ b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
@@ -349,7 +349,7 @@ void Interpreter::ps_sum1(UGeckoInstruction _inst)
 
 void Interpreter::ps_muls0(UGeckoInstruction _inst)
 {
-	double c0 = Force25Bit(rPS1(_inst.FC));
+	double c0 = Force25Bit(rPS0(_inst.FC));
 	double p0 = ForceSingle(NI_mul(rPS0(_inst.FA), c0));
 	double p1 = ForceSingle(NI_mul(rPS1(_inst.FA), c0));
 	rPS0(_inst.FD) = p0;