diff --git a/src/crypto/CryptoNight_monero.h b/src/crypto/CryptoNight_monero.h
index 0ceb93fe..80750c6c 100644
--- a/src/crypto/CryptoNight_monero.h
+++ b/src/crypto/CryptoNight_monero.h
@@ -68,7 +68,7 @@
 #ifdef _MSC_VER
 #   define VARIANT2_SET_ROUNDING_MODE() if (VARIANT == xmrig::VARIANT_2) { _control87(RC_DOWN, MCW_RC); }
 #else
-#   define VARIANT2_SET_ROUNDING_MODE() if (VARIANT == xmrig::VARIANT_2) { std::fesetround(FE_DOWNWARD); }
+#   define VARIANT2_SET_ROUNDING_MODE() if (VARIANT == xmrig::VARIANT_2) { fesetround(FE_DOWNWARD); }
 #endif
 
 #   define VARIANT2_INTEGER_MATH(part, cl, cx) \