diff --git a/config/ChangeLog b/config/ChangeLog
index 9b8cd93be..96d5f7505 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,9 @@
+2009-07-17  Joseph Myers  <joseph@codesourcery.com>
+
+	PR other/40784
+	* tls.m4 (GCC_CHECK_TLS): Add extra quoting around argument to
+	AC_LINK_IFELSE.
+
 2009-07-16  Joseph Myers  <joseph@codesourcery.com>
 
 	* tls.m4 (GCC_CHECK_TLS): Also test TLS in a shared library when
diff --git a/config/tls.m4 b/config/tls.m4
index 4648a9098..0ae60460b 100644
--- a/config/tls.m4
+++ b/config/tls.m4
@@ -79,9 +79,9 @@ AC_DEFUN([GCC_CHECK_TLS], [
 	  CFLAGS="-fPIC $CFLAGS"
 	  dnl If -shared works, test if TLS works in a shared library.
 	  AC_LINK_IFELSE([int f() { return 0; }],
-	    AC_LINK_IFELSE([__thread int a; int b; int f() { return a = b; }],
+	    [AC_LINK_IFELSE([__thread int a; int b; int f() { return a = b; }],
 	      [gcc_cv_have_tls=yes],
-	      [gcc_cv_have_tls=no]),
+	      [gcc_cv_have_tls=no])],
 	    [gcc_cv_have_tls=yes])
 	  CFLAGS="$chktls_save_CFLAGS"
 	  LDFLAGS="$chktls_save_LDFLAGS"], [gcc_cv_have_tls=no])