diff --git a/jdk/src/jdk.management/share/classes/com/sun/management/internal/GcInfoBuilder.java b/jdk/src/jdk.management/share/classes/com/sun/management/internal/GcInfoBuilder.java
index ab5f795f147..0ceb1f6b6d2 100644
--- a/jdk/src/jdk.management/share/classes/com/sun/management/internal/GcInfoBuilder.java
+++ b/jdk/src/jdk.management/share/classes/com/sun/management/internal/GcInfoBuilder.java
@@ -79,7 +79,7 @@ public class GcInfoBuilder {
     }
 
     public String[] getPoolNames() {
-        return poolNames;
+        return poolNames.clone();
     }
 
     int getGcExtItemCount() {