diff --git a/android/variable.go b/android/variable.go
index e830845..672576a 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -282,7 +282,7 @@
 	NativeCoverageExcludePaths []string `json:",omitempty"`
 
 	// Set by NewConfig
-	Native_coverage *bool
+	Native_coverage *bool `json:",omitempty"`
 
 	SanitizeHost       []string `json:",omitempty"`
 	SanitizeDevice     []string `json:",omitempty"`