diff --git a/libs/silk/configure.in b/libs/silk/configure.in
index 6e3917b9c6..bd71b658a5 100644
--- a/libs/silk/configure.in
+++ b/libs/silk/configure.in
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ([2.63])
+AC_PREREQ([2.59])
 AC_INIT(libSKP_SILK_SDK, 1.0.2, brian@freeswitch.org, libSKP_SILK_SDK)
 AM_INIT_AUTOMAKE(libSKP_SILK_SDK,1.0.2)