diff --git a/components/style/element_state.rs b/components/style/element_state.rs
index 530de486caf..1c94580554b 100644
--- a/components/style/element_state.rs
+++ b/components/style/element_state.rs
@@ -58,7 +58,7 @@ bitflags! {
         /// Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-suppressed
         const IN_SUPPRESSED_STATE = 1 << 16,
         /// Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-loading
-        const IN_LOADING_STATE = 1 << 18,
+        const IN_LOADING_STATE = 1 << 17,
         /// Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-handler-blocked
         const IN_HANDLER_BLOCKED_STATE = 1 << 18,
         /// Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-handler-disabled