diff --git a/Swashbuckle.Core/Application/SwaggerUiConfig.cs b/Swashbuckle.Core/Application/SwaggerUiConfig.cs
index f5e75aab8..fa091f2d2 100644
--- a/Swashbuckle.Core/Application/SwaggerUiConfig.cs
+++ b/Swashbuckle.Core/Application/SwaggerUiConfig.cs
@@ -103,6 +103,15 @@ public void CustomAsset(string path, Assembly resourceAssembly, string resourceN
             if (path == "index") isTemplate = true;
             _pathToAssetMap[path] = new EmbeddedAssetDescriptor(resourceAssembly, resourceName, isTemplate);
         }
+	    
+        public void CustomTemplateParameter(string templateParameterName, string parameterValue)
+        {
+	    var nameWithPercentParenthesesWrapper =
+		templateParameterName.StartsWith("%(")
+		    ? templateParameterName
+		    : $"%({templateParameterName})";
+	    _templateParams[nameWithPercentParenthesesWrapper] = parameterValue;
+        }
 
         public void EnableDiscoveryUrlSelector()
         {
@@ -170,4 +179,4 @@ public enum DocExpansion
         List,
         Full
     }
-}
\ No newline at end of file
+}