Index: ports-mgmt/portlint/src/portlint.pl
===================================================================
--- ports-mgmt/portlint/src/portlint.pl
+++ ports-mgmt/portlint/src/portlint.pl
@@ -1478,7 +1478,10 @@
 				&perror("WARN", "", -1, "PLIST_FILES: installing icons, ".
 					"please define INSTALLS_ICONS as appropriate");
 			}
-
+			if ($plist_file =~ m|\%\%([^%]+)\%\%|) {
+				&perror("FATAL", "", -1, "PLIST_FILES: contains an entry with ".
+					"%%".$1."%% placeholder, please use pkg-plist instead.");
+			}
 		}
 	}