diff --git a/3-frames-and-windows/01-popup-windows/article.md b/3-frames-and-windows/01-popup-windows/article.md
index a0c38592..ab951574 100644
--- a/3-frames-and-windows/01-popup-windows/article.md
+++ b/3-frames-and-windows/01-popup-windows/article.md
@@ -69,7 +69,7 @@ name
 : A name of the new window. Each window has a `window.name`, and here we can specify which window to use for the popup. If there's already a window with such name -- the given URL opens in it, otherwise a new window is opened.
 
 params
-: The configuration string for the new window. It contains settings, delimited by a comma. There must be no spaces in params, for instance: `width:200,height=100`.
+: The configuration string for the new window. It contains settings, delimited by a comma. There must be no spaces in params, for instance: `width=200,height=100`.
 
 Settings for `params`: