diff --git a/README b/README
index 9cc491e806..c6523193fa 100644
--- a/README
+++ b/README
@@ -158,6 +158,7 @@ REQUIREMENTS:
         openssl >= 1.1.0 (optional, required to support DNS-over-TLS with openssl)
         elfutils >= 158 (optional)
         polkit (optional)
+        tzdata >= 2014f (optional)
         pkg-config
         gperf
         docbook-xsl (optional, required for documentation)