diff --git a/openfpga/src/base/openfpga_pb_pin_fixup.cpp b/openfpga/src/base/openfpga_pb_pin_fixup.cpp
index 4d7e1cfd4..257ed1ef7 100644
--- a/openfpga/src/base/openfpga_pb_pin_fixup.cpp
+++ b/openfpga/src/base/openfpga_pb_pin_fixup.cpp
@@ -36,7 +36,9 @@ static void update_cluster_pin_with_post_routing_results(
   const VprRoutingAnnotation& vpr_routing_annotation,
   VprClusteringAnnotation& vpr_clustering_annotation, const size_t& layer,
   const vtr::Point<size_t>& grid_coord, const ClusterBlockId& blk_id,
-  const e_side& border_side, const size_t& z, const bool& verbose) {
+  const e_side& border_side, const size_t& z,
+  const bool& perimeter_cb,
+  const bool& verbose) {
   /* Handle each pin */
   auto logical_block = clustering_ctx.clb_nlist.block_type(blk_id);
   auto physical_tile = device_ctx.grid.get_physical_type(
@@ -76,6 +78,13 @@ static void update_cluster_pin_with_post_routing_results(
     if (NUM_SIDES == border_side) {
       VTR_ASSERT(1 == pin_sides.size());
       pin_side = pin_sides[0];
+    } else if (perimeter_cb) {
+      /* When perimeter connection blcoks are allowed, I/O pins may occur on any side but the border side */
+      VTR_ASSERT(pin_sides.end() != std::find(pin_sides.begin(),
+                                              pin_sides.end(),
+                                              border_side));
+      VTR_ASSERT(1 == pin_sides.size());
+      pin_side = pin_sides[0];
     } else {
       SideManager side_manager(border_side);
       VTR_ASSERT(pin_sides.end() != std::find(pin_sides.begin(),
@@ -188,7 +197,9 @@ void update_pb_pin_with_post_routing_results(
   const DeviceContext& device_ctx, const ClusteringContext& clustering_ctx,
   const PlacementContext& placement_ctx,
   const VprRoutingAnnotation& vpr_routing_annotation,
-  VprClusteringAnnotation& vpr_clustering_annotation, const bool& verbose) {
+  VprClusteringAnnotation& vpr_clustering_annotation,
+  const bool& perimeter_cb,
+  const bool& verbose) {
   /* Ensure a clean start: remove all the remapping results from VTR's
    * post-routing clustering result sync-up */
   vpr_clustering_annotation.clear_net_remapping();
@@ -219,7 +230,7 @@ void update_pb_pin_with_post_routing_results(
           device_ctx, clustering_ctx, vpr_routing_annotation,
           vpr_clustering_annotation, layer, grid_coord, cluster_blk_id,
           NUM_SIDES, placement_ctx.block_locs[cluster_blk_id].loc.sub_tile,
-          verbose);
+          perimeter_cb, verbose);
       }
     }
   }
@@ -250,7 +261,8 @@ void update_pb_pin_with_post_routing_results(
         update_cluster_pin_with_post_routing_results(
           device_ctx, clustering_ctx, vpr_routing_annotation,
           vpr_clustering_annotation, layer, io_coord, cluster_blk_id, io_side,
-          placement_ctx.block_locs[cluster_blk_id].loc.sub_tile, verbose);
+          placement_ctx.block_locs[cluster_blk_id].loc.sub_tile,
+          perimeter_cb, verbose);
       }
     }
   }
diff --git a/openfpga/src/base/openfpga_pb_pin_fixup.h b/openfpga/src/base/openfpga_pb_pin_fixup.h
index 6afaa43d1..37877ef1f 100644
--- a/openfpga/src/base/openfpga_pb_pin_fixup.h
+++ b/openfpga/src/base/openfpga_pb_pin_fixup.h
@@ -18,7 +18,9 @@ void update_pb_pin_with_post_routing_results(
   const DeviceContext& device_ctx, const ClusteringContext& clustering_ctx,
   const PlacementContext& placement_ctx,
   const VprRoutingAnnotation& vpr_routing_annotation,
-  VprClusteringAnnotation& vpr_clustering_annotation, const bool& verbose);
+  VprClusteringAnnotation& vpr_clustering_annotation,
+  const bool& perimeter_cb,
+  const bool& verbose);
 
 } /* end namespace openfpga */
 
diff --git a/openfpga/src/base/openfpga_pb_pin_fixup_template.h b/openfpga/src/base/openfpga_pb_pin_fixup_template.h
index e28c99467..945175bad 100644
--- a/openfpga/src/base/openfpga_pb_pin_fixup_template.h
+++ b/openfpga/src/base/openfpga_pb_pin_fixup_template.h
@@ -42,6 +42,7 @@ int pb_pin_fixup_template(T& openfpga_context, const Command& cmd,
     g_vpr_ctx.device(), g_vpr_ctx.clustering(), g_vpr_ctx.placement(),
     openfpga_context.vpr_routing_annotation(),
     openfpga_context.mutable_vpr_clustering_annotation(),
+    g_vpr_ctx.device().arch->perimeter_cb,
     cmd_context.option_enable(cmd, opt_verbose));
 
   /* TODO: should identify the error code from internal function execution */