diff --git a/Eigen/src/Core/products/GeneralBlockPanelKernel.h b/Eigen/src/Core/products/GeneralBlockPanelKernel.h
index 6a16aa661..15f3d869e 100644
--- a/Eigen/src/Core/products/GeneralBlockPanelKernel.h
+++ b/Eigen/src/Core/products/GeneralBlockPanelKernel.h
@@ -83,9 +83,10 @@ inline void manage_caching_sizes(Action action, std::ptrdiff_t* l1, std::ptrdiff
 template<typename LhsScalar, typename RhsScalar, int KcFactor>
 void computeProductBlockingSizes(Index& k, Index& m, Index& n, Index num_threads = 1)
 {
+  typedef gebp_traits<LhsScalar,RhsScalar> Traits;
+
 #ifdef EIGEN_TEST_SPECIFIC_BLOCKING_SIZES
   EIGEN_UNUSED_VARIABLE(num_threads);
-  typedef gebp_traits<LhsScalar,RhsScalar> Traits;
   enum {
     kr = 16,
     mr = Traits::mr,
@@ -99,6 +100,7 @@ void computeProductBlockingSizes(Index& k, Index& m, Index& n, Index num_threads
   if (n > nr) n -= n % nr;
   return;
 #endif
+
   // Explanations:
   // Let's recall that the product algorithms form mc x kc vertical panels A' on the lhs and
   // kc x nc blocks B' on the rhs. B' has to fit into L2/L3 cache. Moreover, A' is processed
@@ -108,7 +110,6 @@ void computeProductBlockingSizes(Index& k, Index& m, Index& n, Index num_threads
   manage_caching_sizes(GetAction, &l1, &l2, &l3);
 
   if (num_threads > 1) {
-    typedef gebp_traits<LhsScalar,RhsScalar> Traits;
     typedef typename Traits::ResScalar ResScalar;
     enum {
       kdiv = KcFactor * (Traits::mr * sizeof(LhsScalar) + Traits::nr * sizeof(RhsScalar)),