diff --git a/mosquitto.spec b/mosquitto.spec
index aef3338..7a2d905 100644
--- a/mosquitto.spec
+++ b/mosquitto.spec
@@ -13,6 +13,7 @@ BuildRequires:  python2-devel
 BuildRequires:  python-setuptools
 BuildRequires:  systemd
 BuildRequires:  uthash-devel
+BuildRequires:  c-ares-devel
 
 Requires(pre):  shadow-utils
 Requires(post): systemd