diff --git a/poi-ooxml/src/main/java/org/apache/poi/openxml4j/opc/PackageRelationshipTypes.java b/poi-ooxml/src/main/java/org/apache/poi/openxml4j/opc/PackageRelationshipTypes.java
index b5a13f875b..1dc1529a8b 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/openxml4j/opc/PackageRelationshipTypes.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/openxml4j/opc/PackageRelationshipTypes.java
@@ -26,7 +26,7 @@ public interface PackageRelationshipTypes {
      *
      *  <p>
      *  The standard specifies a source relations ship for the Core File Properties part as follows:
-     *  <code>http://schemas.openxmlformats.org/officedocument/2006/relationships/metadata/core-properties.</code>
+     *  <code>http://schemas.openxmlformats.org/officeDocument/2006/relationships/metadata/core-properties.</code>
      *  </p>
      *  <p>
      *   Office uses the following source relationship for the Core File Properties part:
@@ -37,9 +37,9 @@ public interface PackageRelationshipTypes {
     String CORE_PROPERTIES = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties";
 
     /**
-     * Core properties relationship type as defiend in ECMA 376.
+     * Core properties relationship type as defined in ECMA 376.
      */
-    String CORE_PROPERTIES_ECMA376 = "http://schemas.openxmlformats.org/officedocument/2006/relationships/metadata/core-properties";
+    String CORE_PROPERTIES_ECMA376 = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/metadata/core-properties";
 
     /**
      * Namespace of Core properties relationship type as defined in ECMA 376