diff --git a/android/config.go b/android/config.go
index 2589f71..8ae6471 100644
--- a/android/config.go
+++ b/android/config.go
@@ -491,11 +491,21 @@
 }
 
 func (c *config) DefaultAppCertificateDir(ctx PathContext) SourcePath {
-	return PathForSource(ctx, "build/target/product/security")
+	defaultCert := String(c.ProductVariables.DefaultAppCertificate)
+	if defaultCert != "" {
+		return PathForSource(ctx, filepath.Dir(defaultCert))
+	} else {
+		return PathForSource(ctx, "build/target/product/security")
+	}
 }
 
 func (c *config) DefaultAppCertificate(ctx PathContext) SourcePath {
-	return c.DefaultAppCertificateDir(ctx).Join(ctx, "testkey")
+	defaultCert := String(c.ProductVariables.DefaultAppCertificate)
+	if defaultCert != "" {
+		return PathForSource(ctx, defaultCert)
+	} else {
+		return c.DefaultAppCertificateDir(ctx).Join(ctx, "testkey")
+	}
 }
 
 func (c *config) AllowMissingDependencies() bool {
diff --git a/android/variable.go b/android/variable.go
index c8a672e..e8d5c69 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -141,6 +141,8 @@
 	AAPTPreferredConfig *string   `json:",omitempty"`
 	AAPTPrebuiltDPI     *[]string `json:",omitempty"`
 
+	DefaultAppCertificate *string `json:",omitempty"`
+
 	AppsDefaultVersionName *string `json:",omitempty"`
 
 	Allow_missing_dependencies *bool `json:",omitempty"`