diff --git a/pci/src/configuration.rs b/pci/src/configuration.rs
index f1bf0957a..f4a190a66 100644
--- a/pci/src/configuration.rs
+++ b/pci/src/configuration.rs
@@ -961,7 +961,7 @@ mod tests {
         foo: u8,
     }
 
-    // It is safe to implement BytesValued; all members are simple numbers and any value is valid.
+    // SAFETY: All members are simple numbers and any value is valid.
     unsafe impl ByteValued for TestCap {}
 
     impl PciCapability for TestCap {
diff --git a/pci/src/msix.rs b/pci/src/msix.rs
index ac814c1da..a9ed04595 100644
--- a/pci/src/msix.rs
+++ b/pci/src/msix.rs
@@ -468,7 +468,7 @@ pub struct MsixCap {
     pub pba: u32,
 }
 
-// It is safe to implement ByteValued. All members are simple numbers and any value is valid.
+// SAFETY: All members are simple numbers and any value is valid.
 unsafe impl ByteValued for MsixCap {}
 
 impl PciCapability for MsixCap {