diff --git a/umem.spec.in b/umem.spec.in
index 7a1810a..3e42d3b 100644
--- a/umem.spec.in
+++ b/umem.spec.in
@@ -11,7 +11,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildRequires:  autoconf >= 2.50
 BuildRequires:  automake >= 1.4
-BuildRequires:  libtool >= 1.5.0
+BuildRequires:  libtool >= 1.4.2
 BuildRequires:  doxygen
 BuildRequires:  gcc
 BuildRequires:  binutils