diff --git a/packages/core-components/src/components/LogViewer/RealLogViewer.tsx b/packages/core-components/src/components/LogViewer/RealLogViewer.tsx
index adb9eeb760..cbeb249815 100644
--- a/packages/core-components/src/components/LogViewer/RealLogViewer.tsx
+++ b/packages/core-components/src/components/LogViewer/RealLogViewer.tsx
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 import Box from '@material-ui/core/Box';
 import IconButton from '@material-ui/core/IconButton';
 import CopyIcon from '@material-ui/icons/FileCopy';
@@ -69,7 +70,7 @@ export function RealLogViewer(props: RealLogViewerProps) {
 
   return (
     <AutoSizer>
-      {({ height, width }) => (
+      {({ height, width }: { height?: number; width?: number }) => (
         <Box style={{ width, height }} className={classes.root}>
           <Box className={classes.header}>
             <LogViewerControls {...search} />