diff --git a/Sources/ServiceModelGenerate/ServiceModelCodeGenerator+generateModelErrors.swift b/Sources/ServiceModelGenerate/ServiceModelCodeGenerator+generateModelErrors.swift
index 722111e..4c3d301 100644
--- a/Sources/ServiceModelGenerate/ServiceModelCodeGenerator+generateModelErrors.swift
+++ b/Sources/ServiceModelGenerate/ServiceModelCodeGenerator+generateModelErrors.swift
@@ -168,6 +168,8 @@ public extension ServiceModelCodeGenerator where TargetSupportType: ModelTargetS
                 """)
         }
         
+        delegate.errorTypeAdditionalExtensions(fileBuilder: fileBuilder, errorTypes: sortedErrors, baseName: baseName)
+        
         if delegate.generateCustomStringConvertibleConformance
             && delegate.generateEncodableConformance {
                 fileBuilder.appendEmptyLine()