diff --git a/squid.spec b/squid.spec
index b779f68..5384a38 100644
--- a/squid.spec
+++ b/squid.spec
@@ -47,7 +47,18 @@ Requires(pre): shadow-utils
 Requires(post): /sbin/chkconfig
 Requires(preun): /sbin/service /sbin/chkconfig
 Requires(postun): /sbin/service
-BuildRequires: openldap-devel pam-devel openssl-devel krb5-devel db4-devel expat-devel
+# squid_ldap_auth and other LDAP helpers require OpenLDAP
+BuildRequires: openldap-devel
+# squid_pam_auth requires PAM development libs
+BuildRequires: pam-devel
+# SSL support requires OpenSSL
+BuildRequires: openssl-devel
+# squid_kerb_aut requires Kerberos development libs
+BuildRequires: krb5-devel
+# squid_session_auth requires DB4
+BuildRequires: db4-devel
+# ESI support requires Expat & libxml2
+BuildRequires: expat-devel libxml2-devel
 Obsoletes: squid-novm
 
 %description