diff --git a/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java b/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
index 4c1acd0179..725ab24888 100644
--- a/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
+++ b/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
@@ -67,7 +67,7 @@ public abstract class OPCPackage implements RelationshipSource, Closeable {
 	/**
 	 * Logger.
 	 */
-    private static POILogger logger = POILogFactory.getLogger(OPCPackage.class);
+    private static final POILogger logger = POILogFactory.getLogger(OPCPackage.class);
 
 	/**
 	 * Default package access.