diff --git a/packages/jsii-pacmak/lib/targets/java.ts b/packages/jsii-pacmak/lib/targets/java.ts
index 11d0898b50..15fd238b88 100644
--- a/packages/jsii-pacmak/lib/targets/java.ts
+++ b/packages/jsii-pacmak/lib/targets/java.ts
@@ -1511,7 +1511,7 @@ function paramJavadoc(name: string, optional?: boolean, summary?: string): strin
 
 function endWithPeriod(s: string): string {
     if (!s.endsWith('.')) {
-        return s += '.';
+        return s + '.';
     }
     return s;
-}
\ No newline at end of file
+}