diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index 08681904ab..feeae95356 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -9046,6 +9046,7 @@ bool cmGeneratorTarget::AddHeaderSetVerification()
             verifyTarget->SetProperty("AUTOUIC", "OFF");
             verifyTarget->SetProperty("DISABLE_PRECOMPILE_HEADERS", "ON");
             verifyTarget->SetProperty("UNITY_BUILD", "OFF");
+            verifyTarget->SetProperty("CXX_SCAN_FOR_MODULES", "OFF");
             cm::optional<std::map<std::string, cmValue>>
               perConfigCompileDefinitions;
             verifyTarget->FinalizeTargetConfiguration(
diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index b51af0b54d..c6bb3df9a0 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -1697,6 +1697,7 @@ void cmGlobalXCodeGenerator::ForceLinkerLanguage(cmGeneratorTarget* gtgt)
   }
   if (cmSourceFile* sf = mf->GetOrCreateSource(fname)) {
     sf->SetProperty("LANGUAGE", llang);
+    sf->SetProperty("CXX_SCAN_FOR_MODULES", "0");
     gtgt->AddSource(fname);
   }
 }
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 2d5ae81635..5cb87a8dff 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -2961,6 +2961,7 @@ void cmLocalGenerator::CopyPchCompilePdb(
   } else {
     cc->SetOutputs(outputs);
     cmSourceFile* copy_rule = this->AddCustomCommandToOutput(std::move(cc));
+    copy_rule->SetProperty("CXX_SCAN_FOR_MODULES", "0");
 
     if (copy_rule) {
       target->AddSource(copy_rule->ResolveFullPath());
@@ -3265,6 +3266,7 @@ void cmLocalGenerator::AddUnityBuild(cmGeneratorTarget* target)
       target->AddSource(file.Path, true);
       unity->SetProperty("SKIP_UNITY_BUILD_INCLUSION", "ON");
       unity->SetProperty("UNITY_SOURCE_FILE", file.Path);
+      unity->SetProperty("CXX_SCAN_FOR_MODULES", "0");
       if (file.PerConfig) {
         unity->SetProperty("COMPILE_DEFINITIONS",
                            "CMAKE_UNITY_CONFIG_$<UPPER_CASE:$<CONFIG>>");
diff --git a/Source/cmQtAutoGenInitializer.cxx b/Source/cmQtAutoGenInitializer.cxx
index 39ac1b4213..8213274eb6 100644
--- a/Source/cmQtAutoGenInitializer.cxx
+++ b/Source/cmQtAutoGenInitializer.cxx
@@ -1914,6 +1914,7 @@ cmSourceFile* cmQtAutoGenInitializer::RegisterGeneratedSource(
   gFile->MarkAsGenerated();
   gFile->SetProperty("SKIP_AUTOGEN", "1");
   gFile->SetProperty("SKIP_LINTING", "ON");
+  gFile->SetProperty("CXX_SCAN_FOR_MODULES", "0");
   return gFile;
 }