diff --git a/book/src/cellvar.md b/book/src/cellvar.md
index 9c7b285da..029317450 100644
--- a/book/src/cellvar.md
+++ b/book/src/cellvar.md
@@ -46,7 +46,7 @@ pub enum Value {
     External(String, usize),
 
     /// A public output.
-    /// This is tracked separately as public inputs as it needs to be computed later.
+    /// This is tracked separately as public outputs as it needs to be computed later.
     PublicOutput(Option<CellVar>),
 }
 ```