diff --git a/rv32.sv b/rv32.sv
index cefab82..e926c3d 100644
--- a/rv32.sv
+++ b/rv32.sv
@@ -11,6 +11,7 @@ module rv32 (
     input clk,
 
     /* control out (memory bus) */
+    output read_out,
     output [3:0] write_mask_out,
 
     /* data in (memory bus) */
@@ -249,6 +250,7 @@ module rv32 (
         .rd_write_out(mem_rd_write),
 
         /* control out (to memory bus) */
+        .read_out(read_out),
         .write_mask_out(write_mask_out),
 
         /* data out */
diff --git a/rv32_mem.sv b/rv32_mem.sv
index 5c6f14e..564280c 100644
--- a/rv32_mem.sv
+++ b/rv32_mem.sv
@@ -37,6 +37,7 @@ module rv32_mem (
     output rd_write_out,
 
     /* control out (to memory bus) */
+    output read_out,
     output [3:0] write_mask_out,
 
     /* data out */
@@ -60,6 +61,7 @@ module rv32_mem (
 
     assign branch_pc_out = branch_pc_in;
 
+    assign read_out = read_in;
     assign address_out = result_in;
 
     always_comb begin
diff --git a/top.sv b/top.sv
index 6dcd137..a6abb97 100644
--- a/top.sv
+++ b/top.sv
@@ -60,6 +60,7 @@ module top (
         .clk(pll_clk),
 
         /* control out */
+        .read_out(mem_read),
         .write_mask_out(mem_write_mask),
 
         /* data in */
@@ -71,6 +72,7 @@ module top (
     );
 
     /* memory bus control */
+    logic mem_read;
     logic [3:0] mem_write_mask;
 
     /* memory bus data */