diff --git a/krArc/krarc.cpp b/krArc/krarc.cpp
--- a/krArc/krarc.cpp
+++ b/krArc/krarc.cpp
@@ -760,8 +760,8 @@
     if (!dest.isLocalFile())
         qDebug() << "ERROR:" << url << "is not a local file.";
 
-    // CMD_COPY is no more in KF5 - TODO?
-    //error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_COPY));
+    // CMD_COPY is no more in KF5 - replaced with 74 value (as stated in kio/src/core/commands_p.h)
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, 74));
 }
 
 void kio_krarcProtocol::listDir(const QUrl &url)