diff --git a/Source/Boxed.AspNetCore.Swagger/SwaggerGenOptionsExtensions.cs b/Source/Boxed.AspNetCore.Swagger/SwaggerGenOptionsExtensions.cs
index ec41b0a5..9bcf614a 100644
--- a/Source/Boxed.AspNetCore.Swagger/SwaggerGenOptionsExtensions.cs
+++ b/Source/Boxed.AspNetCore.Swagger/SwaggerGenOptionsExtensions.cs
@@ -31,8 +31,11 @@ public static SwaggerGenOptions IncludeXmlCommentsIfExists(this SwaggerGenOption
                 throw new ArgumentNullException(nameof(assembly));
             }
 
-            var filePath = Path.ChangeExtension(assembly.Location, ".xml");
-            IncludeXmlCommentsIfExists(options, filePath);
+            if (!string.IsNullOrEmpty(assembly.Location))
+            {
+                var filePath = Path.ChangeExtension(assembly.Location, ".xml");
+                IncludeXmlCommentsIfExists(options, filePath);
+            }
 
             return options;
         }