diff --git a/mozilla/configure.in b/mozilla/configure.in
index ab9d2e1ad45..9f2dc99ad8a 100644
--- a/mozilla/configure.in
+++ b/mozilla/configure.in
@@ -2229,7 +2229,7 @@ AC_CACHE_CHECK(for modern C++ template specialization syntax support,
                                X<Y> y_x;,
                                ac_cv_cpp_modern_specialize_template_syntax=yes,
                                ac_cv_cpp_modern_specialize_template_syntax=no)])
-if test "$ac_cv_cpp_template_specialization" = yes ; then
+if test "$ac_cv_cpp_modern_specialize_template_syntax" = yes ; then
   AC_DEFINE(HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX)
 fi