diff --git a/coregrind/vg_libpthread.c b/coregrind/vg_libpthread.c
index 47d02da..deaeab7 100644
--- a/coregrind/vg_libpthread.c
+++ b/coregrind/vg_libpthread.c
@@ -513,6 +513,15 @@
    return 0;
 }  
 
+__attribute__((weak)) 
+int pthread_setconcurrency(int new_level)
+{
+   if (new_level < 0)
+      return EINVAL;
+   else
+      return 0;
+}
+
 
 /* --------------------------------------------------- 
    Helper functions for running a thread