diff --git a/common/changes/@uifabric/example-app-base/IButtonProps-docx_2018-12-05-00-06.json b/common/changes/@uifabric/example-app-base/IButtonProps-docx_2018-12-05-00-06.json
new file mode 100644
index 0000000000000..14e86694cd411
--- /dev/null
+++ b/common/changes/@uifabric/example-app-base/IButtonProps-docx_2018-12-05-00-06.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/example-app-base",
+      "comment": "Fix for issue#7258:Documentation is missing for button",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/example-app-base",
+  "email": "afhassan@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/example-app-base/src/utilities/parser/Parse.ts b/packages/example-app-base/src/utilities/parser/Parse.ts
index ee952b1bbc5a9..730e6b9b462c4 100644
--- a/packages/example-app-base/src/utilities/parser/Parse.ts
+++ b/packages/example-app-base/src/utilities/parser/Parse.ts
@@ -32,7 +32,7 @@ export function parse(source: string, propsInterfaceOrEnumName?: string): IPrope
   const escapedSource = source.replace(/\\(?!\\)/g, '');
 
   if (propsInterfaceOrEnumName) {
-    regex = new RegExp(`^export (interface|(?:const )?enum) ${propsInterfaceOrEnumName}(?: extends .*?)? \\{( |.*[\\r\\n]*)*?\\}`, 'm');
+    regex = new RegExp(`^export (interface|(?:const )?enum) ${propsInterfaceOrEnumName}(?:\\s*extends .*?)? \\{( |.*[\\r\\n]*)*?\\}`, 'm');
     let regexResult = regex.exec(escapedSource);
     if (regexResult && regexResult.length > 0) {
       parseInfo = _parseEnumOrInterface(regexResult);
@@ -46,7 +46,7 @@ export function parse(source: string, propsInterfaceOrEnumName?: string): IPrope
       ];
     }
   } else {
-    regex = new RegExp(`^export (interface|(?:const )?enum) (\\S*?)(?: extends .*?)? \\{( |.*[\\r\\n]*)*?\\}`, 'gm');
+    regex = new RegExp(`^export (interface|(?:const )?enum) (\\S*?)(?:\\s*extends .*?)? \\{( |.*[\\r\\n]*)*?\\}`, 'gm');
     let regexResult: RegExpExecArray | null;
     let results: Array<IProperty> = [];
     while ((regexResult = regex.exec(escapedSource)) !== null) {