diff --git a/src/m68k.rs b/src/m68k.rs
index 5a980fe..2a9b1a3 100644
--- a/src/m68k.rs
+++ b/src/m68k.rs
@@ -36,11 +36,11 @@ pub enum BusErrorCause {
 impl Display for BusErrorCause {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            BusErrorCause::ReadingByte => f.write_str("reading byte from"),
-            BusErrorCause::ReadingWord => f.write_str("reading word from"),
-            BusErrorCause::WritingByte => f.write_str("writing byte to"),
-            BusErrorCause::WritingWord => f.write_str("writing word to"),
-            BusErrorCause::ReadingInstruction => f.write_str("reading instruction at"),
+            Self::ReadingByte => f.write_str("reading byte from"),
+            Self::ReadingWord => f.write_str("reading word from"),
+            Self::WritingByte => f.write_str("writing byte to"),
+            Self::WritingWord => f.write_str("writing word to"),
+            Self::ReadingInstruction => f.write_str("reading instruction at"),
         }
     }
 }