diff --git a/android/config.go b/android/config.go
index 72372ef..cb1bdf5 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1077,7 +1077,7 @@
 }
 
 func (c *config) FlattenApex() bool {
-	return Bool(c.productVariables.FlattenApex)
+	return Bool(c.productVariables.Flatten_apex)
 }
 
 func (c *config) EnforceSystemCertificate() bool {
diff --git a/android/variable.go b/android/variable.go
index 8886bae..0931db8 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -277,7 +277,7 @@
 	Ndk_abis               *bool `json:",omitempty"`
 	Exclude_draft_ndk_apis *bool `json:",omitempty"`
 
-	FlattenApex *bool `json:",omitempty"`
+	Flatten_apex *bool `json:",omitempty"`
 
 	DexpreoptGlobalConfig *string `json:",omitempty"`