--- liblzf/lzf_c.c	2007/11/13 10:56:57	1.24
+++ liblzf/lzf_c.c	2007/11/13 11:02:28	1.25
@@ -159,12 +159,12 @@
           unsigned int maxlen = in_end - ip - len;
           maxlen = maxlen > MAX_REF ? MAX_REF : maxlen;
 
-          if (expect_false (op + 1 + 3 >= out_end))
-            return 0;
-
           op [- lit - 1] = lit - 1; /* stop run */
           op -= !lit; /* undo run if length is zero */
 
+          if (expect_false (op + 3 + 1 >= out_end))
+            return 0;
+
           for (;;)
             {
               if (expect_true (maxlen > 16))