diff --git a/src/inspector/main_thread_interface.cc b/src/inspector/main_thread_interface.cc
index d3f553caac8f9f..bb637d3a77f6fa 100644
--- a/src/inspector/main_thread_interface.cc
+++ b/src/inspector/main_thread_interface.cc
@@ -5,6 +5,7 @@
 
 #include <functional>
 #include <unicode/unistr.h>
+#include "util-inl.h"
 
 namespace node {
 namespace inspector {
diff --git a/src/util-inl.h b/src/util-inl.h
index 9751f9babe1189..acd370e2358264 100644
--- a/src/util-inl.h
+++ b/src/util-inl.h
@@ -160,8 +160,8 @@ ContainerOfHelper<Inner, Outer>::operator TypeName*() const {
 }
 
 template <typename Inner, typename Outer>
-inline ContainerOfHelper<Inner, Outer> ContainerOf(Inner Outer::*field,
-                                                   Inner* pointer) {
+constexpr ContainerOfHelper<Inner, Outer> ContainerOf(Inner Outer::*field,
+                                                      Inner* pointer) {
   return ContainerOfHelper<Inner, Outer>(field, pointer);
 }
 
diff --git a/src/util.h b/src/util.h
index f0d3189d1af2f2..086e33933e6b5a 100644
--- a/src/util.h
+++ b/src/util.h
@@ -198,8 +198,8 @@ class ContainerOfHelper {
 // Calculate the address of the outer (i.e. embedding) struct from
 // the interior pointer to a data member.
 template <typename Inner, typename Outer>
-inline ContainerOfHelper<Inner, Outer> ContainerOf(Inner Outer::*field,
-                                                   Inner* pointer);
+constexpr ContainerOfHelper<Inner, Outer> ContainerOf(Inner Outer::*field,
+                                                      Inner* pointer);
 
 // Convenience wrapper around v8::String::NewFromOneByte().
 inline v8::Local<v8::String> OneByteString(v8::Isolate* isolate,