diff --git a/ecp5/arch.h b/ecp5/arch.h
index 3df2d84..5e5fc3e 100644
--- a/ecp5/arch.h
+++ b/ecp5/arch.h
@@ -1029,7 +1029,7 @@
                 if (chip_info->tiletype_names[tileloc.tile_names[j].type_idx].get() == type)
                     return tileloc.tile_names[j].name.get();
         }
-        NPNR_ASSERT_FALSE_STR("no with type " + type);
+        NPNR_ASSERT_FALSE_STR("no tile with type " + type);
     }
 
     GlobalInfoPOD globalInfoAtLoc(Location loc);
diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc
index b491bf7..9b1a65a 100644
--- a/ecp5/bitstream.cc
+++ b/ecp5/bitstream.cc
@@ -1397,8 +1397,9 @@
             Loc loc = ctx->getBelLocation(ci->bel);
             bool u = loc.y<15, r = loc.x> 15;
             std::string tiletype = fmt_str("DDRDLL_" << (u ? 'U' : 'L') << (r ? 'R' : 'L'));
-            if (ctx->args.type == ArchArgs::LFE5U_25F || ctx->args.type == ArchArgs::LFE5UM_25F ||
-                ctx->args.type == ArchArgs::LFE5UM5G_25F)
+            if ((ctx->args.type == ArchArgs::LFE5U_25F || ctx->args.type == ArchArgs::LFE5UM_25F ||
+                 ctx->args.type == ArchArgs::LFE5UM5G_25F) &&
+                u)
                 tiletype += "A";
             std::string tile = ctx->getTileByType(tiletype);
             cc.tiles[tile].add_enum("DDRDLL.MODE", "DDRDLLA");