diff --git a/doc/api/child_process.markdown b/doc/api/child_process.markdown
index 1ca5cd7fbac6ed..315670581bba4f 100644
--- a/doc/api/child_process.markdown
+++ b/doc/api/child_process.markdown
@@ -192,7 +192,7 @@ be sent `'SIGTERM'`. See `signal(7)` for a list of available signals.
         grep  = spawn('grep', ['ssh']);
 
     grep.on('close', function (code, signal) {
-      console.log('child process terminated due to receipt of signal '+signal);
+      console.log('child process terminated due to receipt of signal ' + signal);
     });
 
     // send SIGHUP to process