diff --git a/compiler/characterizer/fake_sram.py b/compiler/characterizer/fake_sram.py
index 9d2a409c..001e1398 100644
--- a/compiler/characterizer/fake_sram.py
+++ b/compiler/characterizer/fake_sram.py
@@ -94,9 +94,9 @@ class fake_sram(sram_config):
             self.num_rw_ports + self.num_r_ports + self.num_w_ports)])
         for port in range(self.num_rw_ports):
             self.pins.extend(['din{0}[{1}]'.format(port, bit)
-                              for bit in range(self.num_cols)])
+                              for bit in range(self.word_size)])
             self.pins.extend(['dout{0}[{1}]'.format(port, bit)
-                              for bit in range(self.num_cols)])
+                              for bit in range(self.word_size)])
             self.pins.extend(['addr{0}[{1}]'.format(port, bit)
                               for bit in range(self.addr_size)])
             if self.num_wmasks != 0: