diff --git a/lib/qcd/action/fermion/FermionImplTypedefs.h b/lib/qcd/action/fermion/FermionImplTypedefs.h
new file mode 100644
index 00000000..99657d83
--- /dev/null
+++ b/lib/qcd/action/fermion/FermionImplTypedefs.h
@@ -0,0 +1,10 @@
+    public:
+      typedef typename Impl::Simd                           Simd;
+      typedef typename Impl::FermionField           FermionField;
+      typedef typename Impl::GaugeLinkField       GaugeLinkField;
+      typedef typename Impl::GaugeField               GaugeField;
+      typedef typename Impl::DoubledGaugeField DoubledGaugeField;
+      typedef typename Impl::SiteSpinor               SiteSpinor;
+      typedef typename Impl::SiteHalfSpinor       SiteHalfSpinor;
+      typedef typename Impl::Compressor               Compressor;
+      typedef WilsonKernels<Impl> Kernels;