diff --git a/unbound.spec b/unbound.spec
index af47d6f..8d9e8d9 100644
--- a/unbound.spec
+++ b/unbound.spec
@@ -69,9 +69,13 @@ Patch2:   %{forgeurl}/pull/1349.patch#/unbound-1.25-tls-crypto-policy.patch
 # https://github.com/NLnetLabs/unbound/pull/1401
 Patch3:   %{forgeurl}/pull/1401.patch#/unbound-1.25-tls-crypto-policy-default.patch
 
-BuildRequires: gcc, make
-BuildRequires: flex, openssl-devel
-BuildRequires: libevent-devel expat-devel
+BuildRequires: gcc
+BuildRequires: make
+BuildRequires: flex
+BuildRequires: byacc
+BuildRequires: openssl-devel
+BuildRequires: libevent-devel
+BuildRequires: expat-devel
 BuildRequires: pkgconfig
 %if 0%{?fedora} || 0%{?rhel} >= 10
 BuildRequires: gnupg2