diff --git a/src/lisp/Jmk2 b/src/lisp/Jmk2
index 5446f50..b9398ac 100644
--- a/src/lisp/Jmk2
+++ b/src/lisp/Jmk2
@@ -34,6 +34,11 @@
 	shell "LISP_LIBRARY_PATH=$::lisp_libpath ./lisp $::root/lib/lisp/repl/repl.lisp"
 }
 
+rule valgrind [pwd]/lisp {
+	log VALGRIND "lisp test-gc.lisp"
+	shell "LISP_LIBRARY_PATH=$::lisp_libpath valgrind --track-origins=yes --leak-check=full ./lisp test-gc.lisp"
+}
+
 srcs main.c lisp.c compiler.c lib/std.c plat/linux.c istream.c gc.c \
 	call_list.s error.c