diff --git a/libraries/technology/mac_10g/tech_mac_10g_pkg.vhd b/libraries/technology/mac_10g/tech_mac_10g_pkg.vhd
index 7be61cfb74681d0344d1622b3ee2d336e42445c7..a5a0588ba2a04eda20ee98c453e8c79d80a62977 100644
--- a/libraries/technology/mac_10g/tech_mac_10g_pkg.vhd
+++ b/libraries/technology/mac_10g/tech_mac_10g_pkg.vhd
@@ -52,7 +52,7 @@ PACKAGE BODY tech_mac_10g_pkg IS
   BEGIN
     CASE c_technology IS
       WHEN c_tech_stratixiv => v_csr_addr_w := 13;
-      WHEN c_tech_arria10   => v_csr_addr_w := 10;
+      WHEN c_tech_arria10   => v_csr_addr_w := 13;  -- 13 with INSERT_CSR_ADAPTOR=1 in ip_arria10_mac_10g.qsys, 10 without
       WHEN OTHERS           => v_csr_addr_w := 13;  -- default to c_tech_stratixiv
     END CASE;
     RETURN v_csr_addr_w;