diff --git a/src/lisp/Jmk b/src/lisp/Jmk
index 394e077..7c1fe8e 100644
--- a/src/lisp/Jmk
+++ b/src/lisp/Jmk
@@ -43,6 +43,10 @@
 	status_log(LISP, $(F))
 	@./lisp $(F)
 
+leak-check: lisp
+	status_log(VALGRIND, lisp $(F))
+	@valgrind --leak-check=full ./lisp $(F)
+
 format:
 	status_log(FORMAT, *)
 	@clang-format -i *.c *.h *.dasc plat/* lib/*