diff --git a/Makefile b/Makefile
index c9287d067f23719c7f8f7334d09daa2b6d87b3c9..042a53d588339b9b449e8d7da2192a80c6f6b010 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ sourceDirectory := $(shell pwd)
 #### Common Lisp implementations available for testing.
 ## export ASDF_TEST_LISPS to override the default list of such implementations,
 ## or specify a lisps= argument at the make command-line
-defaultLisps = ccl clisp sbcl ecl ecl_bytecodes cmucl abcl scl allegro lispworks allegromodern gcl xcl
+defaultLisps = ccl clisp sbcl ecl ecl_bytecodes cmucl abcl scl allegro lispworks allegromodern gcl xcl mkcl
 ifdef ASDF_TEST_LISPS
 lisps ?= ${ASDF_TEST_LISPS}
 else
@@ -26,7 +26,7 @@ endif
 
 ## grep for #+/#- features in the test/ directory to see plenty of disabled tests on some platforms
 ## NOT SUPPORTED BY OUR AUTOMATED TESTS:
-##	cormancl genera lispworks-personal-edition mkcl rmcl
+##	cormancl genera lispworks-personal-edition rmcl
 ## Some are manually tested once in a while.
 ifdef ASDF_TEST_SYSTEMS
 s ?= ${ASDF_TEST_SYSTEMS}