diff --git a/src/core/types.rs b/src/core/types.rs
index d4632c3..17c2521 100644
--- a/src/core/types.rs
+++ b/src/core/types.rs
@@ -64,7 +64,7 @@ pub struct Capabilities {
 
 impl Zeroize for Capabilities {
     fn zeroize(&mut self) {
-        for (_, v) in self.entries.iter_mut() {
+        for v in self.entries.values_mut() {
             v.zeroize();
         }
         self.entries.clear();