--- mc-4.6.1/src/cmd.c
+++ mc-4.6.1/src/cmd.c
@@ -1209,7 +1209,7 @@
     sync_profiles ();
     str = g_strconcat ( _(" Setup saved to ~/"), PROFILE_NAME, (char *) NULL);
     
-    message (0, _(" Setup "), str);
+    message (0, _(" Setup "), "%s", str);
     g_free (str);
 }
 
--- mc-4.6.1/src/hotlist.c
+++ mc-4.6.1/src/hotlist.c
@@ -1427,7 +1427,7 @@
 	    msg = g_strconcat (_("MC was unable to write ~/"), HOTLIST_FILENAME,
 				_(" file, your old hotlist entries were not deleted"), (char *) NULL);
 
-	    message (D_ERROR, _(" Hotlist Load "), msg);
+	    message (D_ERROR, _(" Hotlist Load "), "%s", msg);
 	    g_free (msg);
 	}
     } else {
--- mc-4.6.1/vfs/ftpfs.c
+++ mc-4.6.1/vfs/ftpfs.c
@@ -829,7 +829,7 @@
 			    /* If the remote server is an Amiga a leading slash
 			       might be missing. MC needs it because it is used
 			       as separator between hostname and path internally. */
-			    return g_strconcat( "/", bufp, 0);
+			    return g_strconcat( "/", bufp, (char *) NULL);
 			}
 		    } else {
 			ftpfs_errno = EIO;
--- mc-4.6.1/vfs/smbfs.c
+++ mc-4.6.1/vfs/smbfs.c
@@ -546,7 +546,7 @@
     if (p)
         my_remote = p;   /* strip off share/service name */
     /* create remote filename as understood by smb clientgen */
-    result = g_strconcat (my_remote, trailing_asterik ? "/*" : "", 0);
+    result = g_strconcat (my_remote, trailing_asterik ? "/*" : "", (char *) NULL);
     unix_to_dos (result, /* inplace = */ 1); /* code page conversion */
     str_replace(result, '/', '\\');
     return result;