diff --git a/compiler/router/hanan_graph.py b/compiler/router/hanan_graph.py
index 1c094fb5..b66e4943 100644
--- a/compiler/router/hanan_graph.py
+++ b/compiler/router/hanan_graph.py
@@ -66,7 +66,7 @@ class hanan_graph:
 
         # Find the blockages that are in the routing area
         self.graph_blockages = []
-        for blockage in self.router.blockages:
+        for blockage in self.get_blockages(source.name):
             # Set the region's lpp to current blockage's lpp so that the
             # overlaps method works
             region.lpp = blockage.lpp
@@ -81,6 +81,23 @@ class hanan_graph:
         debug.info(0, "Number of nodes in the routing graph: {}".format(len(self.nodes)))
 
 
+    def get_blockages(self, pin_name):
+        """
+        Return all blockages for this routing region, including pins with
+        different name.
+        """
+
+        # Create a copy of blockages
+        blockages = self.router.blockages[:]
+        # Create a copy of pins with different name than the routed pins
+        for name, pins, in self.router.pins.items():
+            if name == pin_name:
+                continue
+            for pin in pins:
+                blockages.append(deepcopy(pin).inflated_pin(multiple=1))
+        return blockages
+
+
     def generate_cartesian_values(self):
         """
         Generate x and y values from all the corners of the shapes in the