diff --git a/libobjc/configure.ac b/libobjc/configure.ac
index 8820edc..ed532fa 100644
--- a/libobjc/configure.ac
+++ b/libobjc/configure.ac
@@ -215,6 +215,8 @@
         [Define if the compiler has a thread header that is non single.])
 fi 
 
+# Check if we have thread-local storage
+GCC_CHECK_TLS
 
 AC_MSG_CHECKING([for exception model to use])
 AC_LANG_PUSH(C)