diff --git a/android/androidmk.go b/android/androidmk.go
index 18e3e7ac4..846d5061c 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -504,6 +504,7 @@ type fillInEntriesContext interface {
 	Config() Config
 	ModuleProvider(module blueprint.Module, provider blueprint.ProviderKey) interface{}
 	ModuleHasProvider(module blueprint.Module, provider blueprint.ProviderKey) bool
+	ModuleType(module blueprint.Module) string
 }
 
 func (a *AndroidMkEntries) fillInEntries(ctx fillInEntriesContext, mod blueprint.Module) {
@@ -527,7 +528,7 @@ func (a *AndroidMkEntries) fillInEntries(ctx fillInEntriesContext, mod blueprint
 		fmt.Fprintf(&a.header, distString)
 	}
 
-	fmt.Fprintln(&a.header, "\ninclude $(CLEAR_VARS)")
+	fmt.Fprintln(&a.header, "\ninclude $(CLEAR_VARS)  # "+ctx.ModuleType(mod))
 
 	// Collect make variable assignment entries.
 	a.SetString("LOCAL_PATH", ctx.ModuleDir(mod))
diff --git a/apex/androidmk.go b/apex/androidmk.go
index 3373211a0..0fc971bb0 100644
--- a/apex/androidmk.go
+++ b/apex/androidmk.go
@@ -134,7 +134,7 @@ func (a *apexBundle) androidMkForFiles(w io.Writer, apexBundleName, apexName, mo
 			continue
 		}
 
-		fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
+		fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)  # apex.apexBundle.files")
 		if fi.moduleDir != "" {
 			fmt.Fprintln(w, "LOCAL_PATH :=", fi.moduleDir)
 		} else {
@@ -348,7 +348,7 @@ func (a *apexBundle) androidMkForType() android.AndroidMkData {
 
 			if apexType == flattenedApex {
 				// Only image APEXes can be flattened.
-				fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
+				fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)  # apex.apexBundle.flat")
 				fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
 				fmt.Fprintln(w, "LOCAL_MODULE :=", name+a.suffix)
 				data.Entries.WriteLicenseVariables(w)
@@ -356,7 +356,7 @@ func (a *apexBundle) androidMkForType() android.AndroidMkData {
 				fmt.Fprintln(w, "include $(BUILD_PHONY_PACKAGE)")
 
 			} else {
-				fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
+				fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)  # apex.apexBundle")
 				fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
 				fmt.Fprintln(w, "LOCAL_MODULE :=", name+a.suffix)
 				data.Entries.WriteLicenseVariables(w)
diff --git a/bpf/bpf.go b/bpf/bpf.go
index a840fa3df..d91180b91 100644
--- a/bpf/bpf.go
+++ b/bpf/bpf.go
@@ -227,7 +227,7 @@ func (bpf *bpf) AndroidMk() android.AndroidMkData {
 			for _, obj := range bpf.objs {
 				objName := name + "_" + obj.Base()
 				names = append(names, objName)
-				fmt.Fprintln(w, "include $(CLEAR_VARS)")
+				fmt.Fprintln(w, "include $(CLEAR_VARS)", " # bpf.bpf.obj")
 				fmt.Fprintln(w, "LOCAL_MODULE := ", objName)
 				data.Entries.WriteLicenseVariables(w)
 				fmt.Fprintln(w, "LOCAL_PREBUILT_MODULE_FILE :=", obj.String())
@@ -237,7 +237,7 @@ func (bpf *bpf) AndroidMk() android.AndroidMkData {
 				fmt.Fprintln(w, "include $(BUILD_PREBUILT)")
 				fmt.Fprintln(w)
 			}
-			fmt.Fprintln(w, "include $(CLEAR_VARS)")
+			fmt.Fprintln(w, "include $(CLEAR_VARS)", " # bpf.bpf")
 			fmt.Fprintln(w, "LOCAL_MODULE := ", name)
 			data.Entries.WriteLicenseVariables(w)
 			fmt.Fprintln(w, "LOCAL_REQUIRED_MODULES :=", strings.Join(names, " "))
diff --git a/java/robolectric.go b/java/robolectric.go
index 2cb07981e..1d567083d 100644
--- a/java/robolectric.go
+++ b/java/robolectric.go
@@ -327,7 +327,7 @@ func (r *robolectricTest) AndroidMkEntries() []android.AndroidMkEntries {
 
 func (r *robolectricTest) writeTestRunner(w io.Writer, module, name string, tests []string) {
 	fmt.Fprintln(w, "")
-	fmt.Fprintln(w, "include $(CLEAR_VARS)")
+	fmt.Fprintln(w, "include $(CLEAR_VARS)", " # java.robolectricTest")
 	fmt.Fprintln(w, "LOCAL_MODULE :=", name)
 	fmt.Fprintln(w, "LOCAL_JAVA_LIBRARIES :=", module)
 	fmt.Fprintln(w, "LOCAL_JAVA_LIBRARIES += ", strings.Join(r.libs, " "))
diff --git a/phony/phony.go b/phony/phony.go
index a31d402af..760b79b8a 100644
--- a/phony/phony.go
+++ b/phony/phony.go
@@ -49,7 +49,7 @@ func (p *phony) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 func (p *phony) AndroidMk() android.AndroidMkData {
 	return android.AndroidMkData{
 		Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
-			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
+			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)", " # phony.phony")
 			fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
 			fmt.Fprintln(w, "LOCAL_MODULE :=", name)
 			data.Entries.WriteLicenseVariables(w)
diff --git a/sysprop/sysprop_library.go b/sysprop/sysprop_library.go
index 1f0d28d56..0edbb7c37 100644
--- a/sysprop/sysprop_library.go
+++ b/sysprop/sysprop_library.go
@@ -336,8 +336,8 @@ func (m *syspropLibrary) AndroidMk() android.AndroidMkData {
 		Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
 			// sysprop_library module itself is defined as a FAKE module to perform API check.
 			// Actual implementation libraries are created on LoadHookMutator
-			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
-			fmt.Fprintf(w, "LOCAL_MODULE := %s\n", m.Name())
+			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)", " # sysprop.syspropLibrary")
+			fmt.Fprintln(w, "LOCAL_MODULE :=", m.Name())
 			data.Entries.WriteLicenseVariables(w)
 			fmt.Fprintf(w, "LOCAL_MODULE_CLASS := FAKE\n")
 			fmt.Fprintf(w, "LOCAL_MODULE_TAGS := optional\n")