1 files changed, 4 insertions, 0 deletions
diff --git a/sphinx/themes/epub/static/epub.css b/sphinx/themes/epub/static/epub.css
index 30912b9a..2e90481d 100644
--- a/sphinx/themes/epub/static/epub.css
+++ b/sphinx/themes/epub/static/epub.css
@@ -363,6 +363,10 @@ dl.glossary dt {
     font-size: 130%;
 }
 
+.sig-paren {
+    font-size: larger;
+}
+
 .versionmodified {
     font-style: italic;
 }