diff --git a/src/diagnostic.rs b/src/diagnostic.rs
index a1a6014..dec4a83 100644
--- a/src/diagnostic.rs
+++ b/src/diagnostic.rs
@@ -84,7 +84,7 @@ pub enum DiagnosticCode {
     SecurityRisk,
 
     // Performance
-    IneffientRuleOrder,
+    InefficientRuleOrder,
     LargeSetWithoutTimeout,
     MissingCounters,
 
@@ -143,7 +143,7 @@ impl fmt::Display for DiagnosticCode {
             DiagnosticCode::MissingDocumentation => "NFT309",
             DiagnosticCode::SecurityRisk => "NFT310",
 
-            DiagnosticCode::IneffientRuleOrder => "NFT401",
+            DiagnosticCode::InefficientRuleOrder => "NFT401",
             DiagnosticCode::LargeSetWithoutTimeout => "NFT402",
             DiagnosticCode::MissingCounters => "NFT403",