diff --git a/krArc/krarc.cpp b/krArc/krarc.cpp
--- a/krArc/krarc.cpp
+++ b/krArc/krarc.cpp
@@ -820,6 +820,7 @@
     if (!dest.isLocalFile())
         KRDEBUG("ERROR: " << url.path() << " is not a local file.");
 
+    // CMD_COPY is no more in KF5 - replaced with 74 value (as stated in kio/src/core/commands_p.h, which could be found in quickgit.kde.org/?p=kio.git&a=tree)
     error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, 74));
 }