diff --git a/coregrind/m_sigframe/sigframe-tilegx-linux.c b/coregrind/m_sigframe/sigframe-tilegx-linux.c
index e6cf4ef..9514afe 100644
--- a/coregrind/m_sigframe/sigframe-tilegx-linux.c
+++ b/coregrind/m_sigframe/sigframe-tilegx-linux.c
@@ -76,7 +76,7 @@
   ThreadId        tid = tst->tid;
   NSegment const* stackseg = NULL;
 
-  if (VG_(extend_stack)(addr, addr))
+  if (VG_(extend_stack)(tid, addr))
     stackseg = VG_(am_find_nsegment)(addr);
 
   if (stackseg == NULL || !stackseg->hasR || !stackseg->hasW)