diff --git a/src/crosvm/cmdline.rs b/src/crosvm/cmdline.rs
index e785ca6cbc..f314e6b9d1 100644
--- a/src/crosvm/cmdline.rs
+++ b/src/crosvm/cmdline.rs
@@ -637,14 +637,20 @@ pub struct RunCommand {
     /// (EXPERIMENTAL) Comma separated key=value pairs for setting
     /// up a display on the virtio-gpu device
     /// Possible key values:
-    ///     mode=(borderless_full_screen|windowed) - Whether to show the window on the host in full
-    ///        screen or windowed mode. If not specified, windowed mode is used by default.
-    ///     width=INT - The width of the virtual display connected to the virtio-gpu. Can't be set
-    ///        with the borderless_full_screen display mode.
-    ///     height=INT - The height of the virtual display connected to the virtio-gpu. Can't be set
-    ///        with the borderless_full_screen display mode.
-    ///     hidden[=true|=false] - If the display window is initially hidden.
-    ///     refresh_rate=INT - Force a specific vsync generation rate in hertz on the guest.
+    ///     mode=(borderless_full_screen|windowed) - Whether to show
+    ///        the window on the host in full screen or windowed
+    ///        mode. If not specified, windowed mode is used by
+    ///        default.
+    ///     width=INT - The width of the virtual display connected
+    ///        to the virtio-gpu. Can't be set with the
+    ///        borderless_full_screen display mode.
+    ///     height=INT - The height of the virtual display connected
+    ///        to the virtio-gpu. Can't be set with the
+    ///        borderless_full_screen display mode.
+    ///     hidden[=true|=false] - If the display window is
+    ///        initially hidden (default: false).
+    ///     refresh-rate=INT - Force a specific vsync generation
+    ///        rate in hertz on the guest (default: 60)
     #[cfg(unix)]
     pub gpu_display: Vec<GpuDisplayParameters>,
     #[cfg(feature = "gpu")]