diff --git a/README.md b/README.md
index 4aeea16..2260492 100644
--- a/README.md
+++ b/README.md
@@ -281,7 +281,7 @@ Support for the timer is always disabled when ENABLE_IRQ is set to 0.
 #### ENABLE_TRACE (default = 0)
 
 Produce an execution trace using the `trace_valid` and `trace_data` output ports.
-For a demontration of this feature run `make testbench.vcd` to create a trace file
+For a demontration of this feature run `make test_vcd` to create a trace file
 and then run `python3 showtrace.py testbench.trace firmware/firmware.elf` to decode
 it.
 
diff --git a/showtrace.py b/showtrace.py
index 7d7316a..60ffcd6 100644
--- a/showtrace.py
+++ b/showtrace.py
@@ -11,7 +11,7 @@ with subprocess.Popen(["riscv32-unknown-elf-objdump", "-d", elf_filename], stdou
     while True:
         line = proc.stdout.readline().decode("ascii")
         if line == '': break
-        match = re.match(r'^\s*([0-9a-f]+):\s+(\S+)\s*(.*)', line)
+        match = re.match(r'^\s*([0-9a-f]+):\s+([0-9a-f]+)\s*(.*)', line)
         if match: insns[int(match.group(1), 16)] = (int(match.group(2), 16), match.group(3).replace("\t", " "))
 
 with open(trace_filename, "r") as f: