diff --git a/java/java.go b/java/java.go
index 0b48873..288042b 100644
--- a/java/java.go
+++ b/java/java.go
@@ -2454,7 +2454,7 @@
 	ret := []string{}
 	ret = append(ret, al.properties.Libs.GetOrDefault(ctx, nil)...)
 	ret = append(ret, al.properties.Static_libs.GetOrDefault(ctx, nil)...)
-	if al.properties.System_modules != nil {
+	if proptools.StringDefault(al.properties.System_modules, "none") != "none" {
 		ret = append(ret, proptools.String(al.properties.System_modules))
 	}
 	// Other non java_library dependencies like java_api_contribution are ignored for now.