diff --git a/hbvm/src/vm/mod.rs b/hbvm/src/vm/mod.rs
index 4e466ac4..7b378149 100644
--- a/hbvm/src/vm/mod.rs
+++ b/hbvm/src/vm/mod.rs
@@ -87,7 +87,7 @@ pub struct Vm<'a, PfHandler, const TIMER_QUOTIENT: usize> {
     /// Trap handler
     pub pfhandler: PfHandler,
 
-    // Program counter
+    /// Program counter
     pc: usize,
 
     /// Program