diff --git a/types/react-bootstrap/lib/Glyphicon.d.ts b/types/react-bootstrap/lib/Glyphicon.d.ts
index 036af24cb3..17cf8e9fc7 100644
--- a/types/react-bootstrap/lib/Glyphicon.d.ts
+++ b/types/react-bootstrap/lib/Glyphicon.d.ts
@@ -4,6 +4,8 @@ declare namespace Glyphicon {
     export interface GlyphiconProps extends React.HTMLProps<Glyphicon> {
         // Required
         glyph: string;
+        // Optional
+        bsClass?: string;
     }
 }
 declare class Glyphicon extends React.Component<Glyphicon.GlyphiconProps> { }