diff --git a/src/common/fp/op/FPNeg.h b/src/common/fp/op/FPNeg.h
index c138bc3f..1b8534be 100644
--- a/src/common/fp/op/FPNeg.h
+++ b/src/common/fp/op/FPNeg.h
@@ -11,7 +11,7 @@
 namespace Dynarmic::FP {
 
 template<typename FPT>
-inline FPT FPNeg(FPT op) {
+constexpr FPT FPNeg(FPT op) {
     return op ^ FPInfo<FPT>::sign_mask;
 }