diff --git a/stages/mvstex.py b/stages/mvstex.py
index a45c3b179..6b4b64b12 100644
--- a/stages/mvstex.py
+++ b/stages/mvstex.py
@@ -110,7 +110,7 @@ def add_run(nvm_file, primary=True, band=None):
 
                 mvs_tmp_dir = os.path.join(r['out_dir'], 'tmp')
 
-                # Make sure tmp directory is empty
+                # mvstex creates a tmp directory, so make sure it is empty
                 if io.dir_exists(mvs_tmp_dir):
                     log.ODM_INFO("Removing old tmp directory {}".format(mvs_tmp_dir))
                     shutil.rmtree(mvs_tmp_dir)