diff --git a/src/vaev-base/overflow.h b/src/vaev-base/overflow.h
index bf1a472..e66174d 100644
--- a/src/vaev-base/overflow.h
+++ b/src/vaev-base/overflow.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <karm-io/emit.h>
+
 namespace Vaev {
 
 // https://www.w3.org/TR/css-overflow/#overflow-control
diff --git a/src/vaev-base/text.h b/src/vaev-base/text.h
index b3651d1..0081411 100644
--- a/src/vaev-base/text.h
+++ b/src/vaev-base/text.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <karm-io/emit.h>
+
 namespace Vaev {
 
 // CSS Text Module Level 4
diff --git a/src/vaev-base/visibility.h b/src/vaev-base/visibility.h
index 7286119..fc1c0d7 100644
--- a/src/vaev-base/visibility.h
+++ b/src/vaev-base/visibility.h
@@ -6,6 +6,8 @@ enum struct Visibility {
     VISIBLE,
     HIDDEN,
     COLLAPSE,
+
+    _LEN
 };
 
 } // namespace Vaev