diff --git a/packages/slate-react/src/components/leaf.tsx b/packages/slate-react/src/components/leaf.tsx
index 0d3e438a4..c5edc7bc1 100644
--- a/packages/slate-react/src/components/leaf.tsx
+++ b/packages/slate-react/src/components/leaf.tsx
@@ -41,6 +41,7 @@ const Leaf = (props: {
             maxWidth: '100%',
             whiteSpace: 'nowrap',
             opacity: '0.333',
+            userSelect: 'none',
           }}
         >
           {leaf.placeholder as React.ReactNode}