diff --git a/source/sqlsrv/init.cpp b/source/sqlsrv/init.cpp
index bea1d178..e19f521f 100644
--- a/source/sqlsrv/init.cpp
+++ b/source/sqlsrv/init.cpp
@@ -387,7 +387,6 @@ PHP_MINIT_FUNCTION(sqlsrv)
     constant_type.typeinfo.size = 27;
     constant_type.typeinfo.scale = 7;
     REGISTER_LONG_CONSTANT( "SQLSRV_SQLTYPE_DATETIME2",        constant_type.value, CONST_PERSISTENT | CONST_CS );
-    REGISTER_LONG_CONSTANT("SQLSRV_SQLTYPE_SQL_VARIANT",       SQL_SS_VARIANT, CONST_PERSISTENT | CONST_CS);
 
 	
 	// These constant are defined to provide type checking (type ==SQLSRV_SQLTYPE_DECIMAL).