diff --git a/ui/build/config.go b/ui/build/config.go
index c171a67..2605f5b 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -50,8 +50,10 @@
 	targetDevice    string
 	targetDeviceDir string
 
-	pdkBuild       bool
-	brokenDupRules bool
+	pdkBuild bool
+
+	brokenDupRules     bool
+	brokenPhonyTargets bool
 
 	pathReplaced bool
 }
@@ -577,6 +579,14 @@
 	return c.brokenDupRules
 }
 
+func (c *configImpl) SetBuildBrokenPhonyTargets(val bool) {
+	c.brokenPhonyTargets = val
+}
+
+func (c *configImpl) BuildBrokenPhonyTargets() bool {
+	return c.brokenPhonyTargets
+}
+
 func (c *configImpl) SetTargetDeviceDir(dir string) {
 	c.targetDeviceDir = dir
 }
diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index 8f9d8f2..fadf6c6 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -165,10 +165,12 @@
 		// Whether --werror_overriding_commands will work
 		"BUILD_BROKEN_DUP_RULES",
 
+		// Used to turn on --werror_ options in Kati
+		"BUILD_BROKEN_PHONY_TARGETS",
+
 		// Not used, but useful to be in the soong.log
 		"BUILD_BROKEN_ANDROIDMK_EXPORTS",
 		"BUILD_BROKEN_DUP_COPY_HEADERS",
-		"BUILD_BROKEN_PHONY_TARGETS",
 	}, exportEnvVars...), BannerVars...)
 
 	make_vars, err := dumpMakeVars(ctx, config, config.Arguments(), allVars, true)
@@ -196,4 +198,5 @@
 
 	config.SetPdkBuild(make_vars["TARGET_BUILD_PDK"] == "true")
 	config.SetBuildBrokenDupRules(make_vars["BUILD_BROKEN_DUP_RULES"] == "true")
+	config.SetBuildBrokenPhonyTargets(make_vars["BUILD_BROKEN_PHONY_TARGETS"] != "false")
 }
diff --git a/ui/build/kati.go b/ui/build/kati.go
index de8dbf4..b54872c 100644
--- a/ui/build/kati.go
+++ b/ui/build/kati.go
@@ -93,6 +93,10 @@
 		args = append(args, "--werror_overriding_commands")
 	}
 
+	if !config.BuildBrokenPhonyTargets() {
+		args = append(args, "--werror_real_to_phony", "--werror_phony_looks_real")
+	}
+
 	if !config.Environment().IsFalse("KATI_EMULATE_FIND") {
 		args = append(args, "--use_find_emulator")
 	}