diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 3f948b80f9..e232899a7c 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -1338,8 +1338,8 @@ void cmGlobalGenerator::Configure()
     this->CMakeInstance->GetHomeOutputDirectory());
 
   if (this->ExtraGenerator && !this->CMakeInstance->GetIsInTryCompile()) {
-    this->CMakeInstance->IssueDiagnostic(
-      cmDiagnostics::CMD_DEPRECATED,
+    this->CMakeInstance->IssueMessage(
+      MessageType::WARNING,
       cmStrCat("Support for \"Extra Generators\" like\n  ",
                this->ExtraGenerator->GetName(),
                "\nis deprecated and will be removed from a future version "
diff --git a/Tests/RunCMake/ExtraGenerators/Simple-stderr.txt b/Tests/RunCMake/ExtraGenerators/Simple-stderr.txt
index 8a52089294..4621971241 100644
--- a/Tests/RunCMake/ExtraGenerators/Simple-stderr.txt
+++ b/Tests/RunCMake/ExtraGenerators/Simple-stderr.txt
@@ -1,4 +1,4 @@
-^CMake Warning \(deprecated\):
+^CMake Warning:
   Support for "Extra Generators" like
 
     [^