diff --git a/libgtpnl.spec b/libgtpnl.spec
index 180241a..5f58e7e 100644
--- a/libgtpnl.spec
+++ b/libgtpnl.spec
@@ -61,6 +61,7 @@ applications that want to make use of libgtpnl.
 %setup -q
 
 %build
+echo "%version" >.tarball-version
 autoreconf -fi
 %configure --includedir="%_includedir/%name"
 make %{?_smp_mflags}