diff --git a/centos/1.6.2.24/build-asterisk.sh b/centos/1.6.2.24/build-asterisk.sh
index 25ca093..9373bb5 100755
--- a/centos/1.6.2.24/build-asterisk.sh
+++ b/centos/1.6.2.24/build-asterisk.sh
@@ -30,6 +30,7 @@ yum -y install \
   curl \
   bison \
   nano \
+  speex speex-devel \
   fail2ban
 
 mkdir -p /usr/src/asterisk \