diff --git a/src/client/graphics/layers/ChatModal.ts b/src/client/graphics/layers/ChatModal.ts
index 13827eb7c..40cb4e4a4 100644
--- a/src/client/graphics/layers/ChatModal.ts
+++ b/src/client/graphics/layers/ChatModal.ts
@@ -173,7 +173,8 @@ export class ChatModal extends LitElement {
           <button
             class="chat-send-button"
             @click=${this.sendChatMessage}
-            ?disabled=${!this.previewText}
+            ?disabled=${!this.previewText ||
+            (this.requiresPlayerSelection && !this.selectedPlayer)}
           >
             ${translateText("chat.send")}
           </button>
diff --git a/src/client/styles/modal/chat.css b/src/client/styles/modal/chat.css
index c8759ebdc..a71856ba9 100644
--- a/src/client/styles/modal/chat.css
+++ b/src/client/styles/modal/chat.css
@@ -57,6 +57,11 @@
   cursor: pointer;
 }
 
+.chat-send-button:disabled {
+  background: #666;
+  cursor: not-allowed;
+}
+
 .chat-column {
   display: flex;
   flex-direction: column;