diff --git a/src/calibre/srv/fast_css_transform.cpp b/src/calibre/srv/fast_css_transform.cpp
index 40f67e16f8..434a2aea9f 100644
--- a/src/calibre/srv/fast_css_transform.cpp
+++ b/src/calibre/srv/fast_css_transform.cpp
@@ -496,7 +496,7 @@ class Parser {
 
         // hash {{{
         void enter_at_keyword() {
-            states.push(ParseState::hash);
+            states.push(ParseState::at_keyword);
             token_queue.add_at_keyword();
         }