diff --git a/cmd/soong_ui/main.go b/cmd/soong_ui/main.go
index 4f6de82..584cc04 100644
--- a/cmd/soong_ui/main.go
+++ b/cmd/soong_ui/main.go
@@ -333,7 +333,7 @@
 
 	varName := flags.Arg(0)
 	if varName == "report_config" {
-		varData, err := build.DumpMakeVars(ctx, config, nil, build.BannerVars)
+		varData, err := build.DumpMakeVars(ctx, config, nil, append(build.BannerVars, "PRODUCT_SOONG_ONLY"))
 		if err != nil {
 			ctx.Fatal(err)
 		}
@@ -400,7 +400,7 @@
 
 	if i := indexList("report_config", allVars); i != -1 {
 		allVars = append(allVars[:i], allVars[i+1:]...)
-		allVars = append(allVars, build.BannerVars...)
+		allVars = append(allVars, append(build.BannerVars, "PRODUCT_SOONG_ONLY")...)
 	}
 
 	if len(allVars) == 0 {