diff --git a/doc/zjit.md b/doc/zjit.md
index c0378031b2..d0d3e36191 100644
--- a/doc/zjit.md
+++ b/doc/zjit.md
@@ -150,10 +150,10 @@ Through [Stackprof](https://github.com/tmm1/stackprof), detailed information abo
 ./miniruby --zjit-trace-exits script.rb
 ```
 
-A file called `zjit_exit_locations{timestamp}.dump` will be created in the same directory as `script.rb`. Viewing the side exited methods can be done with Stackprof:
+A file called `zjit_exits_{pid}.dump` will be created in the same directory as `script.rb`. Viewing the side exited methods can be done with Stackprof:
 
 ```bash
-stackprof path/to/zjit_exit_locations{timestamp}.dump
+stackprof path/to/zjit_exits_{pid}.dump
 ```
 
 ## Useful dev commands
diff --git a/zjit.rb b/zjit.rb
index fad6d7d807..9e1e502536 100644
--- a/zjit.rb
+++ b/zjit.rb
@@ -277,7 +277,7 @@ class << RubyVM::ZJIT
   def dump_locations # :nodoc:
     return unless trace_exit_locations_enabled?
 
-    filename = "zjit_exits_#{Time.now.to_i}.dump"
+    filename = "zjit_exits_#{Process.pid}.dump"
     n_bytes = dump_exit_locations(filename)
 
     $stderr.puts("#{n_bytes} bytes written to #{filename}.")