diff --git a/gateware/cal/cal.sv b/gateware/cal/cal.sv
index 44ea2b8..3c3f9fc 100644
--- a/gateware/cal/cal.sv
+++ b/gateware/cal/cal.sv
@@ -15,14 +15,10 @@
 // for any inputs for which a jack is not connected.
 
 `default_nettype none
+`define HW_R33
 
 module cal #(
     parameter W = 16, // sample width
-`ifdef HW_R33
-    parameter CAL_MEM_FILE = "cal/cal_mem_default_r33.hex"
-`else
-    parameter CAL_MEM_FILE = "cal/cal_mem_default_r31.hex"
-`endif
 )(
     input rst,
     input clk_256fs,
@@ -46,6 +42,8 @@ module cal #(
     output logic signed [W-1:0] out7
 );
 
+localparam CAL_MEM_FILE = "/home/seb/dev/eurorack-pmod-litex/deps/eurorack-pmod/gateware/cal/cal_mem_default_r33.hex";
+
 localparam N_CHANNELS = 8;
 localparam LAST_CH_IX = 3'd7;
 
diff --git a/gateware/drivers/pmod_i2c_master.sv b/gateware/drivers/pmod_i2c_master.sv
index 2746e0f..aac144e 100644
--- a/gateware/drivers/pmod_i2c_master.sv
+++ b/gateware/drivers/pmod_i2c_master.sv
@@ -13,6 +13,7 @@
 // functions of the board without having to resort to using a softcore.
 
 `default_nettype none
+`define HW_R33
 
 module pmod_i2c_master #(
       parameter CODEC_CFG  = "drivers/ak4619-cfg.hex"
diff --git a/gateware/eurorack_pmod.sv b/gateware/eurorack_pmod.sv
index 3a240f6..685f458 100644
--- a/gateware/eurorack_pmod.sv
+++ b/gateware/eurorack_pmod.sv
@@ -6,6 +6,7 @@
 // handled by external user-defined logic.
 
 `default_nettype none
+`define HW_R33
 
 module eurorack_pmod #(
     parameter W = 16, // sample width, bits