diff --git a/README.md b/README.md
index de4cfbd..3ebbbdf 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Note: These patterns require sequentially-numbered files matching the following
 
 ## Refresh
 
-If a non-zero `refresh=<integer><unit>` query parameter is provided, the page will reload after that interval.
+If a positive-value `refresh=<integer><unit>` query parameter is provided, the page will reload after that interval.
 
 This can be used to generate a sort of slideshow of images.