diff --git a/dovecot.spec b/dovecot.spec
index eba9723..a1c3dee 100644
--- a/dovecot.spec
+++ b/dovecot.spec
@@ -50,7 +50,10 @@ BuildRequires: openldap-devel
 BuildRequires: krb5-devel
 BuildRequires: quota-devel
 BuildRequires: xz-devel
+BuildRequires: lz4-devel
 BuildRequires: libsodium-devel
+BuildRequires: libexttextcat-devel
+BuildRequires: libstemmer-devel
 
 # gettext-devel is needed for running autoconf because of the
 # presence of AM_ICONV