diff --git a/cql3/statements/modification_statement.cc b/cql3/statements/modification_statement.cc
index fc42862359..8cb330edde 100644
--- a/cql3/statements/modification_statement.cc
+++ b/cql3/statements/modification_statement.cc
@@ -36,7 +36,7 @@ namespace cql3 {
 
 namespace statements {
 
-::shared_ptr<column_identifier> modification_statement::CAS_RESULT_COLUMN = ::make_shared<column_identifier>("[applied]", false);
+thread_local const ::shared_ptr<column_identifier> modification_statement::CAS_RESULT_COLUMN = ::make_shared<column_identifier>("[applied]", false);
 
 std::ostream&
 operator<<(std::ostream& out, modification_statement::statement_type t) {
diff --git a/cql3/statements/modification_statement.hh b/cql3/statements/modification_statement.hh
index 3575b352a3..86d0ede702 100644
--- a/cql3/statements/modification_statement.hh
+++ b/cql3/statements/modification_statement.hh
@@ -54,7 +54,7 @@ namespace statements {
  */
 class modification_statement : public cql_statement {
 private:
-    static ::shared_ptr<column_identifier> CAS_RESULT_COLUMN;
+    static thread_local const ::shared_ptr<column_identifier> CAS_RESULT_COLUMN;
 
 public:
     enum class statement_type { INSERT, UPDATE, DELETE };