diff --git a/include/boost/unordered/detail/mulx.hpp b/include/boost/unordered/detail/mulx.hpp
index 93baea9f..1cb6af02 100644
--- a/include/boost/unordered/detail/mulx.hpp
+++ b/include/boost/unordered/detail/mulx.hpp
@@ -94,15 +94,17 @@ inline boost::uint32_t mulx32( boost::uint32_t x, boost::uint32_t y )
 #endif
 #endif
 
+// multipliers from https://arxiv.org/abs/2001.05304
+
 inline std::size_t mulx( std::size_t x ) noexcept
 {
 #if defined(BOOST_UNORDERED_64B_ARCHITECTURE)
 
-    return (std::size_t)mulx64( (boost::uint64_t)x, 0x9E3779B97F4A7C15ull );
+    return (std::size_t)mulx64( (boost::uint64_t)x, 0xDEFBA91144F2B375ull );
 
 #else /* 32 bits assumed */
 
-    return mulx32( x, 0x9E3779B9u );
+    return mulx32( x, 0xE817FB2Du );
 
 #endif
 }