diff --git a/servo/components/style/element_state.rs b/servo/components/style/element_state.rs
index b57f2a99beb1..87ad23ca04df 100644
--- a/servo/components/style/element_state.rs
+++ b/servo/components/style/element_state.rs
@@ -13,51 +13,51 @@ bitflags! {
         #[doc = "The mouse is down on this element. \
                  https://html.spec.whatwg.org/multipage/#selector-active \
                  FIXME(#7333): set/unset this when appropriate"]
-        const IN_ACTIVE_STATE = 0x01,
+        const IN_ACTIVE_STATE = 1 << 0,
         #[doc = "This element has focus. \
                  https://html.spec.whatwg.org/multipage/#selector-focus"]
-        const IN_FOCUS_STATE = 0x02,
+        const IN_FOCUS_STATE = 1 << 1,
         #[doc = "The mouse is hovering over this element. \
                  https://html.spec.whatwg.org/multipage/#selector-hover"]
-        const IN_HOVER_STATE = 0x04,
+        const IN_HOVER_STATE = 1 << 2,
         #[doc = "Content is enabled (and can be disabled). \
                  http://www.whatwg.org/html/#selector-enabled"]
-        const IN_ENABLED_STATE = 0x08,
+        const IN_ENABLED_STATE = 1 << 3,
         #[doc = "Content is disabled. \
                  http://www.whatwg.org/html/#selector-disabled"]
-        const IN_DISABLED_STATE = 0x10,
+        const IN_DISABLED_STATE = 1 << 4,
         #[doc = "Content is checked. \
                  https://html.spec.whatwg.org/multipage/#selector-checked"]
-        const IN_CHECKED_STATE = 0x20,
+        const IN_CHECKED_STATE = 1 << 5,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-indeterminate"]
-        const IN_INDETERMINATE_STATE = 0x40,
+        const IN_INDETERMINATE_STATE = 1 << 6,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-placeholder-shown"]
-        const IN_PLACEHOLDER_SHOWN_STATE = 0x80,
+        const IN_PLACEHOLDER_SHOWN_STATE = 1 << 7,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-target"]
-        const IN_TARGET_STATE = 0x100,
+        const IN_TARGET_STATE = 1 << 8,
         #[doc = "https://fullscreen.spec.whatwg.org/#%3Afullscreen-pseudo-class"]
-        const IN_FULLSCREEN_STATE = 0x200,
+        const IN_FULLSCREEN_STATE = 1 << 9,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-valid"]
-        const IN_VALID_STATE = 0x400,
+        const IN_VALID_STATE = 1 << 10,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-invalid"]
-        const IN_INVALID_STATE = 0x800,
+        const IN_INVALID_STATE = 1 << 11,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-ui-valid"]
-        const IN_MOZ_UI_VALID_STATE = 0x1000,
+        const IN_MOZ_UI_VALID_STATE = 1 << 12,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-broken"]
-        const IN_BROKEN_STATE = 0x2000,
+        const IN_BROKEN_STATE = 1 << 13,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-user-disabled"]
-        const IN_USER_DISABLED_STATE = 0x4000,
+        const IN_USER_DISABLED_STATE = 1 << 14,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-suppressed"]
-        const IN_SUPPRESSED_STATE = 0x8000,
+        const IN_SUPPRESSED_STATE = 1 << 15,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-loading"]
-        const IN_LOADING_STATE = 0x10000,
+        const IN_LOADING_STATE = 1 << 16,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-handler-blocked"]
-        const IN_HANDLER_BLOCKED_STATE = 0x20000,
+        const IN_HANDLER_BLOCKED_STATE = 1 << 17,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-handler-disabled"]
-        const IN_HANDLER_DISABLED_STATE = 0x40000,
+        const IN_HANDLER_DISABLED_STATE = 1 << 18,
         #[doc = "Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-handler-crashed"]
-        const IN_HANDLER_CRASHED_STATE = 0x80000,
+        const IN_HANDLER_CRASHED_STATE = 1 << 19,
         #[doc = "https://html.spec.whatwg.org/multipage/#selector-read-write"]
-        const IN_READ_WRITE_STATE = 0x100000,
+        const IN_READ_WRITE_STATE = 1 << 20,
     }
 }