diff --git a/material-ui/index.d.ts b/material-ui/index.d.ts
index 7475374530..d9ba4fc071 100644
--- a/material-ui/index.d.ts
+++ b/material-ui/index.d.ts
@@ -1549,6 +1549,7 @@ declare namespace __MaterialUI {
             completed?: boolean;
             disabled?: boolean;
             icon?: React.ReactNode | string | number;
+            iconContainerStyle?: React.CSSProperties;
             style?: React.CSSProperties;
         }
         export class StepLabel extends React.Component<StepLabelProps, {}> {