diff --git a/dom/base/nsGlobalWindowInner.cpp b/dom/base/nsGlobalWindowInner.cpp
index 17521f27a44b..1b3f2514feb5 100644
--- a/dom/base/nsGlobalWindowInner.cpp
+++ b/dom/base/nsGlobalWindowInner.cpp
@@ -18,7 +18,6 @@
 #include "nsDOMNavigationTiming.h"
 #include "nsIDOMStorageManager.h"
 #include "mozilla/dom/AutoplayRequest.h"
-#include "mozilla/dom/ContentChild.h"
 #include "mozilla/dom/DOMJSProxyHandler.h"
 #include "mozilla/dom/DOMPrefs.h"
 #include "mozilla/dom/EventTarget.h"
@@ -8157,6 +8156,17 @@ nsGlobalWindowInner::ReleaseFirstPartyStorageAccessGrantedOrigins()
 
 }
 
+namespace mozilla {
+namespace dom {
+
+extern void
+SendFirstPartyStorageAccessGrantedForOriginToParentProcess(nsIPrincipal* aPrincipal,
+                                                           const nsACString& aParentOrigin,
+                                                           const nsACString& aGrantedOrigin);
+
+} // namespace dom
+} // namespace mozilla
+
 void
 nsGlobalWindowInner::SaveFirstPartyStorageAccessGrantedFor(const nsAString& aOrigin)
 {
@@ -8189,14 +8199,11 @@ nsGlobalWindowInner::SaveFirstPartyStorageAccessGrantedFor(const nsAString& aOri
     return;
   }
 
-  ContentChild* cc = ContentChild::GetSingleton();
-  MOZ_ASSERT(cc);
-
-  // This is not really secure, because here we have the content process sending
-  // the request of storing a permission.
-  Unused << cc->SendFirstPartyStorageAccessGrantedForOrigin(IPC::Principal(principal),
-                                                            parentOrigin,
-                                                            grantedOrigin);
+  // We have this external function because ContentChild includes windows.h and
+  // for this reason it cannot be included here.
+  SendFirstPartyStorageAccessGrantedForOriginToParentProcess(principal,
+                                                             parentOrigin,
+                                                             grantedOrigin);
 }
 
 /* static */ void
diff --git a/dom/ipc/ContentChild.cpp b/dom/ipc/ContentChild.cpp
index 75ab2048eeaa..993e9cbb0b14 100644
--- a/dom/ipc/ContentChild.cpp
+++ b/dom/ipc/ContentChild.cpp
@@ -3279,6 +3279,25 @@ NextWindowID()
   return (processBits << kWindowIDWindowBits) | windowBits;
 }
 
+// This code goes here rather than nsGlobalWindow.cpp because nsGlobalWindow.cpp
+// can't include ContentChild.h since it includes windows.h.
+void
+SendFirstPartyStorageAccessGrantedForOriginToParentProcess(nsIPrincipal* aPrincipal,
+                                                           const nsACString& aParentOrigin,
+                                                           const nsACString& aGrantedOrigin)
+{
+  MOZ_ASSERT(!XRE_IsParentProcess());
+
+  ContentChild* cc = ContentChild::GetSingleton();
+  MOZ_ASSERT(cc);
+
+  // This is not really secure, because here we have the content process sending
+  // the request of storing a permission.
+  Unused << cc->SendFirstPartyStorageAccessGrantedForOrigin(IPC::Principal(aPrincipal),
+                                                            nsCString(aParentOrigin),
+                                                            nsCString(aGrantedOrigin));
+}
+
 mozilla::ipc::IPCResult
 ContentChild::RecvInvokeDragSession(nsTArray<IPCDataTransfer>&& aTransfers,
                                     const uint32_t& aAction)
diff --git a/dom/ipc/ContentChild.h b/dom/ipc/ContentChild.h
index 0d65219d0558..d21cbe1b4352 100644
--- a/dom/ipc/ContentChild.h
+++ b/dom/ipc/ContentChild.h
@@ -848,6 +848,11 @@ private:
 uint64_t
 NextWindowID();
 
+void
+SendFirstPartyStorageAccessGrantedForOriginToParentProcess(nsIPrincipal* aPrincipal,
+                                                           const nsACString& aParentOrigin,
+                                                           const nsACString& aGrantedOrigin);
+
 } // namespace dom
 } // namespace mozilla