diff --git a/src/node_http2.cc b/src/node_http2.cc
index f56489bc5a034e..ea94713ecbaefe 100644
--- a/src/node_http2.cc
+++ b/src/node_http2.cc
@@ -3289,7 +3289,7 @@ HTTP_STATUS_CODES(V)
   env->SetMethod(target, "packSettings", PackSettings);
 
   target->Set(context,
-              FIXED_ONE_BYTE_STRING(isolate, "constants"),
+              env->constants_string(),
               constants).FromJust();
   target->Set(context,
               FIXED_ONE_BYTE_STRING(isolate, "nameForErrorCode"),
diff --git a/src/pipe_wrap.cc b/src/pipe_wrap.cc
index 0f2259b789e464..9b1779b84561ad 100644
--- a/src/pipe_wrap.cc
+++ b/src/pipe_wrap.cc
@@ -117,7 +117,7 @@ void PipeWrap::Initialize(Local<Object> target,
   NODE_DEFINE_CONSTANT(constants, SERVER);
   NODE_DEFINE_CONSTANT(constants, IPC);
   target->Set(context,
-              FIXED_ONE_BYTE_STRING(env->isolate(), "constants"),
+              env->constants_string(),
               constants).FromJust();
 }
 
diff --git a/src/tcp_wrap.cc b/src/tcp_wrap.cc
index 3ad0eb4e0ce4fe..65d5adabd86663 100644
--- a/src/tcp_wrap.cc
+++ b/src/tcp_wrap.cc
@@ -132,7 +132,7 @@ void TCPWrap::Initialize(Local<Object> target,
   NODE_DEFINE_CONSTANT(constants, SOCKET);
   NODE_DEFINE_CONSTANT(constants, SERVER);
   target->Set(context,
-              FIXED_ONE_BYTE_STRING(env->isolate(), "constants"),
+              env->constants_string(),
               constants).FromJust();
 }