1 files changed, 15 insertions, 9 deletions
diff --git a/packages/react-docs/src/components/signature.tsx b/packages/react-docs/src/components/signature.tsx
index bf9c8be24..a690a1f03 100644
--- a/packages/react-docs/src/components/signature.tsx
+++ b/packages/react-docs/src/components/signature.tsx
@@ -1,8 +1,9 @@
 import * as _ from 'lodash';
 import * as React from 'react';
 
+import { Parameter, Type as TypeDef, TypeDefinitionByName, TypeParameter } from '@0xproject/types';
+
 import { DocsInfo } from '../docs_info';
-import { Parameter, Type as TypeDef, TypeDefinitionByName, TypeParameter } from '../types';
 
 import { Type } from './type';
 
@@ -134,14 +135,19 @@ function renderTypeParameter(
 ): React.ReactNode {
     const typeParam = (
         <span>
-            {`<${typeParameter.name} extends `}
-            <Type
-                type={typeParameter.type}
-                sectionName={sectionName}
-                typeDefinitionByName={typeDefinitionByName}
-                docsInfo={docsInfo}
-                isInPopover={isInPopover}
-            />
+            {`<${typeParameter.name}`}
+            {!_.isUndefined(typeParameter.type) && (
+                <span>
+                    {' extends '}
+                    <Type
+                        type={typeParameter.type}
+                        sectionName={sectionName}
+                        typeDefinitionByName={typeDefinitionByName}
+                        docsInfo={docsInfo}
+                        isInPopover={isInPopover}
+                    />
+                </span>
+            )}
             {`>`}
         </span>
     );