diff --git a/Source/Core/Core/Src/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp b/Source/Core/Core/Src/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
index 6468b875dc..b29b7dad35 100644
--- a/Source/Core/Core/Src/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
+++ b/Source/Core/Core/Src/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
@@ -242,7 +242,9 @@ void Interpreter::fnegx(UGeckoInstruction _inst)
 
 void Interpreter::fselx(UGeckoInstruction _inst)
 {
-	rPS0(_inst.FD) = (rPS0(_inst.FA) >= -0.0) ? rPS0(_inst.FC) : rPS0(_inst.FB);
+	// D = (A >= 0) ? C : B
+	rPS0(_inst.FD) = (rPS0(_inst.FA) < 0.0 || riPS0(_inst.FA) == PPC_NAN_U64) ?
+		rPS0(_inst.FB) : rPS0(_inst.FC);
 	// This is a binary instruction. Does not alter FPSCR
 	if (_inst.Rc) Helper_UpdateCR1(rPS0(_inst.FD));
 }