diff --git a/src/ooxml/java/org/apache/poi/openxml4j/opc/internal/ContentTypeManager.java b/src/ooxml/java/org/apache/poi/openxml4j/opc/internal/ContentTypeManager.java
index cc8550b903..537dd15e91 100644
--- a/src/ooxml/java/org/apache/poi/openxml4j/opc/internal/ContentTypeManager.java
+++ b/src/ooxml/java/org/apache/poi/openxml4j/opc/internal/ContentTypeManager.java
@@ -341,7 +341,7 @@ public abstract class ContentTypeManager {
 		 */
 		if (this.container != null && this.container.getPart(partName) != null) {
 			throw new OpenXML4JRuntimeException(
-					"Rule M2.4 exception : this error should NEVER happen! Please raise a bug at https://bz.apache.org/bugzilla/enter_bug.cgi?product=POI and attach a file that triggers it, thanks!");
+					"Rule M2.4 exception : this error should NEVER happen! If you can provide the triggering file, then please raise a bug at https://bz.apache.org/bugzilla/enter_bug.cgi?product=POI and attach the file that triggers it, thanks!");
 		}
 		return null;
 	}