diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index 20c919566..b545d0b9c 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -170,4 +170,4 @@ password_cancel=Cancel
 printing_not_supported=Warning: Printing is not fully supported by this browser.
 printing_not_ready=Warning: The PDF is not fully loaded for printing.
 web_fonts_disabled=Web fonts are disabled: unable to use embedded PDF fonts.
-document_colors_not_allowed=PDF documents are not allowed to use their own colors: 'Allow pages to choose their own colors' is deactivated in the browser.
+document_colors_not_allowed=PDF documents are not allowed to use their own colors: “Allow pages to choose their own colors” is deactivated in the browser.