--- code/trunk/pcre_study.c	2010/06/16 10:51:15	545
+++ code/trunk/pcre_study.c	2010/10/10 16:24:11	550
@@ -419,10 +419,13 @@
     case OP_MARK:
     case OP_PRUNE_ARG:
     case OP_SKIP_ARG:
-    case OP_THEN_ARG:
     cc += _pcre_OP_lengths[op] + cc[1];
     break;
 
+    case OP_THEN_ARG:
+    cc += _pcre_OP_lengths[op] + cc[1+LINK_SIZE];
+    break;
+
     /* For the record, these are the opcodes that are matched by "default":
     OP_ACCEPT, OP_CLOSE, OP_COMMIT, OP_FAIL, OP_PRUNE, OP_SET_SOM, OP_SKIP,
     OP_THEN. */