diff --git a/crates/call/src/room.rs b/crates/call/src/room.rs
index 455377209523f0dc33f6fe0b179507ef0f246e5d..d3d462e54aa167f5aa328ea8544968ad1b25d9a7 100644
--- a/crates/call/src/room.rs
+++ b/crates/call/src/room.rs
@@ -615,6 +615,8 @@ impl Room {
     pub fn share_screen(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
         if self.status.is_offline() {
             return Task::ready(Err(anyhow!("room is offline")));
+        } else if self.is_screen_sharing() {
+            return Task::ready(Err(anyhow!("screen was already shared")));
         }
 
         cx.spawn_weak(|this, mut cx| async move {