diff --git a/src/enums.rs b/src/enums.rs
index 6c7f8f4..1f4b9b8 100644
--- a/src/enums.rs
+++ b/src/enums.rs
@@ -14,8 +14,9 @@ pub enum MessageIdentifier {
 }
 
 impl fmt::Display for MessageIdentifier {
+    #[inline]
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
+        match *self {
             Self::Request => write!(f, "Request"),
             Self::Response => write!(f, "Response"),
             Self::Unacked => write!(f, "Unacked"),
@@ -36,9 +37,10 @@ pub enum FunctionCode {
     RemoteProcedureCall = 0x07,
 }
 
-impl std::fmt::Display for FunctionCode {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
+impl fmt::Display for FunctionCode {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
             Self::VirtualREAD => write!(f, "VirtualREAD"),
             Self::VirtualWRITE => write!(f, "VirtualWRITE"),
             Self::RemoteProcedureCall => write!(f, "RemoteProcedureCall"),