diff --git a/aqbanking.spec b/aqbanking.spec
index 95c1930..bf3b135 100644
--- a/aqbanking.spec
+++ b/aqbanking.spec
@@ -19,7 +19,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 # qbanking
 BuildRequires: %{qt3pkg}-devel
 # python
-BuildRequires: python, PyXML
+BuildRequires: python, PyXML, gmp-devel
 BuildRequires: gwenhywfar-devel >= 3.4.1, libofx-devel >= 0.9.0, gettext, libtool
 Requires(post): /sbin/ldconfig
 Requires(postun): /sbin/ldconfig