diff --git a/strongswan.spec b/strongswan.spec
index 7358d18..051ca2b 100644
--- a/strongswan.spec
+++ b/strongswan.spec
@@ -20,6 +20,7 @@ BuildRequires:  flex
 BuildRequires:  bison
 BuildRequires:  automake
 BuildRequires:  autoconf
+BuildRequires:  libtoolize
 %if 0%{?fedora} >= 15 || 0%{?rhel} >= 7
 BuildRequires:  systemd-units
 Requires(post): systemd-units