diff --git a/libgcc/gthr-os2.h b/libgcc/gthr-os2.h
index 79228cd8f..36820fcad 100644
--- a/libgcc/gthr-os2.h
+++ b/libgcc/gthr-os2.h
@@ -184,6 +184,12 @@ __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
   return 0;
 }
 
+static inline int
+__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
+{
+  return 0;
+}
+
 static inline int
 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 {
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 5acf79cba..ef4aeb2bc 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -15420,6 +15420,7 @@ case $target_thread_file in
     dce)	thread_header=config/pa/gthr-dce.h ;;
     lynx)	thread_header=config/gthr-lynx.h ;;
     mipssde)	thread_header=config/mips/gthr-mipssde.h ;;
+    os2)	thread_header=gthr-os2.h ;;
     posix)	thread_header=gthr-posix.h ;;
     rtems)	thread_header=config/gthr-rtems.h ;;
     single)	thread_header=gthr-single.h ;;