diff --git a/include/boost/unordered/detail/implementation.hpp b/include/boost/unordered/detail/implementation.hpp
index 54333400..ecb05226 100644
--- a/include/boost/unordered/detail/implementation.hpp
+++ b/include/boost/unordered/detail/implementation.hpp
@@ -65,7 +65,7 @@
 // (as of May 2017).
 
 #if !defined(BOOST_UNORDERED_SUN_WORKAROUNDS1)
-#if BOOST_COMP_SUNPRO && BOOST_COMP_SUNPRO < BOOST_VERSION_NUMBER(5, 21, 0)
+#if BOOST_COMP_SUNPRO && BOOST_COMP_SUNPRO < BOOST_VERSION_NUMBER(5, 20, 0)
 #define BOOST_UNORDERED_SUN_WORKAROUNDS1 1
 #else
 #define BOOST_UNORDERED_SUN_WORKAROUNDS1 0