diff --git a/configure.ac b/configure.ac
index 6f18c0e..b1ab0a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@
 # under the License.
 #
 
-#AC_PREREQ(2.65)
+AC_PREREQ(2.65)
 
 AC_INIT([thrift], [0.7.0-dev])