1 files changed, 3 insertions, 1 deletions

diff --git a/src/lib_io.c b/src/lib_io.c
index 6e330a73..cb6df46d 100644
--- a/src/lib_io.c
+++ b/src/lib_io.c
@@ -23,6 +23,7 @@
 #include "lj_state.h"
 #include "lj_ff.h"
 #include "lj_lib.h"
+#include "lj_strscan.h"
 
 /* Userdata payload for I/O file. */
 typedef struct IOFileUD {
@@ -324,13 +325,14 @@ LJLIB_CF(io_method_seek)
   FILE *fp = io_tofile(L)->fp;
   int opt = lj_lib_checkopt(L, 2, 1, "\3set\3cur\3end");
   int64_t ofs = 0;
-  cTValue *o;
+  TValue *o;
   int res;
   if (opt == 0) opt = SEEK_SET;
   else if (opt == 1) opt = SEEK_CUR;
   else if (opt == 2) opt = SEEK_END;
   o = L->base+2;
   if (o < L->top) {
+    if (tvisstr(o)) lj_strscan_num(strV(o), o);
     if (tvisint(o))
       ofs = (int64_t)intV(o);
     else if (tvisnum(o))