diff --git a/testbenches/common/v/spmd_testbench.v b/testbenches/common/v/spmd_testbench.v
index 2e214f618..ddf131f78 100644
--- a/testbenches/common/v/spmd_testbench.v
+++ b/testbenches/common/v/spmd_testbench.v
@@ -42,7 +42,7 @@ module spmd_testbench
 
   parameter wh_flit_width_p = vcache_dma_data_width_p;
   parameter wh_ruche_factor_p = 2;
-  parameter wh_cid_width_p = `BSG_SAFE_CLOG2(2*wh_ruche_factor_p+1); // no concentration in this testbench; cid is ignored.
+  parameter wh_cid_width_p = `BSG_SAFE_CLOG2(2*2*wh_ruche_factor_p); // no concentration in this testbench; cid is ignored.
   parameter wh_len_width_p = `BSG_SAFE_CLOG2(1+(vcache_block_size_in_words_p*vcache_data_width_p/vcache_dma_data_width_p)); // header + addr + data
   parameter wh_cord_width_p = x_cord_width_p;