diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h
index 401e3e95..9efee100 100644
--- a/OpenAL32/Include/alu.h
+++ b/OpenAL32/Include/alu.h
@@ -245,8 +245,10 @@ static __inline int SetMixerFPUMode(void)
     (void)_controlfp(_RC_CHOP|_PC_24, _MCW_RC|_MCW_PC);
 #elif defined(HAVE_FESETROUND)
     fpuState = fegetround();
+#ifdef FE_TOWARDZERO
     fesetround(FE_TOWARDZERO);
 #endif
+#endif
 #endif
     return fpuState;
 }