diff --git a/sys/src/cmd/acid/print.c b/sys/src/cmd/acid/print.c
index 6ca4e570b..27450e78a 100644
--- a/sys/src/cmd/acid/print.c
+++ b/sys/src/cmd/acid/print.c
@@ -88,6 +88,7 @@ fundefs(void)
 			Bprint(bout, "%-*s", max, vec[j]);
 		Bprint(bout, "\n");
 	}
+	free(vec);
 }
 
 void