diff --git a/src/node_http2.cc b/src/node_http2.cc
index ce5523a9d22aa8..a77f123d32a0bf 100644
--- a/src/node_http2.cc
+++ b/src/node_http2.cc
@@ -3111,7 +3111,7 @@ 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 eb1e06876c2d86..66b9677cc92fec 100644
--- a/src/pipe_wrap.cc
+++ b/src/pipe_wrap.cc
@@ -109,7 +109,7 @@ void PipeWrap::Initialize(Local<Object> target,
   NODE_DEFINE_CONSTANT(constants, UV_READABLE);
   NODE_DEFINE_CONSTANT(constants, UV_WRITABLE);
   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 cda30d84105735..d462eff15d391c 100644
--- a/src/tcp_wrap.cc
+++ b/src/tcp_wrap.cc
@@ -124,7 +124,7 @@ 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();
 }