diff --git a/src/components/app/BottomBox.css b/src/components/app/BottomBox.css
index 9f38ad6b4d..39bc7f90a5 100644
--- a/src/components/app/BottomBox.css
+++ b/src/components/app/BottomBox.css
@@ -132,6 +132,11 @@
   background-image: var(--internal-fullscreen-exit-icon);
 }
 
+.bottom-fullscreen-show-button,
+.bottom-fullscreen-hide-button {
+  background-size: 11px 11px;
+}
+
 .codeLoadingOverlay,
 .sourceCodeErrorOverlay,
 .assemblyCodeErrorOverlay {