diff --git a/src/iec61850/inc_private/mms_mapping_internal.h b/src/iec61850/inc_private/mms_mapping_internal.h
index 95433498..126c47e3 100644
--- a/src/iec61850/inc_private/mms_mapping_internal.h
+++ b/src/iec61850/inc_private/mms_mapping_internal.h
@@ -273,7 +273,7 @@ struct sMmsMapping {
     bool useIntegratedPublisher;
 
     LinkedList gseControls;
-    const char* gooseInterfaceId;
+    char* gooseInterfaceId;
 
     GoCBEventHandler goCbHandler;
     void* goCbHandlerParameter;