diff --git a/java/java.go b/java/java.go
index 0188cf1..7645d85 100644
--- a/java/java.go
+++ b/java/java.go
@@ -540,9 +540,10 @@
 }
 
 type jniLib struct {
-	name   string
-	path   android.Path
-	target android.Target
+	name         string
+	path         android.Path
+	target       android.Target
+	coverageFile android.OptionalPath
 }
 
 func (j *Module) shouldInstrument(ctx android.BaseModuleContext) bool {