diff --git a/extensions/spellcheck/hunspell/glue/PRemoteSpellcheckEngine.ipdl b/extensions/spellcheck/hunspell/glue/PRemoteSpellcheckEngine.ipdl
index 23e09fb42cfa..f2612c6c8539 100644
--- a/extensions/spellcheck/hunspell/glue/PRemoteSpellcheckEngine.ipdl
+++ b/extensions/spellcheck/hunspell/glue/PRemoteSpellcheckEngine.ipdl
@@ -14,8 +14,6 @@ parent:
 
   async CheckAsync(nsString[] aWord) returns (bool[] aIsMisspelled);
 
-  sync CheckAndSuggest(nsString aWord) returns (bool aIsMisspelled, nsString[] aSuggestions);
-
   sync SetDictionary(nsCString aDictionary) returns (bool success);
 
   async Suggest(nsString aWord, uint32_t aCount) returns (nsString[] aSuggestions);
diff --git a/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.cpp b/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.cpp
index d5e20c412152..160034db441a 100644
--- a/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.cpp
+++ b/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.cpp
@@ -53,17 +53,6 @@ mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvCheckAsync(
   return IPC_OK();
 }
 
-mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvCheckAndSuggest(
-    const nsString& aWord, bool* aIsMisspelled,
-    nsTArray<nsString>* aSuggestions) {
-  nsresult rv = mSpellChecker->CheckWord(aWord, aIsMisspelled, aSuggestions);
-  if (NS_FAILED(rv)) {
-    aSuggestions->Clear();
-    *aIsMisspelled = false;
-  }
-  return IPC_OK();
-}
-
 mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvSuggest(
     const nsString& aWord, uint32_t aCount, SuggestResolver&& aResolve) {
   nsTArray<nsString> suggestions;
diff --git a/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.h b/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.h
index 70ac63ff74eb..1a8d2a61350f 100644
--- a/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.h
+++ b/extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.h
@@ -29,10 +29,6 @@ class RemoteSpellcheckEngineParent : public PRemoteSpellcheckEngineParent {
   virtual mozilla::ipc::IPCResult RecvCheckAsync(nsTArray<nsString>&& aWord,
                                                  CheckAsyncResolver&& aResolve);
 
-  virtual mozilla::ipc::IPCResult RecvCheckAndSuggest(
-      const nsString& aWord, bool* aIsMisspelled,
-      nsTArray<nsString>* aSuggestions);
-
   virtual mozilla::ipc::IPCResult RecvSuggest(const nsString& aWord,
                                               uint32_t aCount,
                                               SuggestResolver&& aResolve);
diff --git a/ipc/ipdl/sync-messages.ini b/ipc/ipdl/sync-messages.ini
index 7bd7c983d993..5aed6480c3a7 100644
--- a/ipc/ipdl/sync-messages.ini
+++ b/ipc/ipdl/sync-messages.ini
@@ -864,8 +864,6 @@ description = See corresponding comment in PBackgroundLSSnapshot.ipdl
 description = See corresponding comment in PBackgroundLSSnapshot.ipdl
 [PBackgroundSessionStorageCache::Load]
 description = See corresponding comment in PBackgroundSessionStorageCache.ipdl
-[PRemoteSpellcheckEngine::CheckAndSuggest]
-description = legacy sync IPC - please add detailed description
 [PRemoteSpellcheckEngine::SetDictionary]
 description = legacy sync IPC - please add detailed description
 [PGPU::AddLayerTreeIdMapping]