diff --git a/dap-gateway/src/main/resources/static/chat.html b/dap-gateway/src/main/resources/static/chat.html
index 3c18712e..ce739fe1 100644
--- a/dap-gateway/src/main/resources/static/chat.html
+++ b/dap-gateway/src/main/resources/static/chat.html
@@ -247,7 +247,7 @@
                 buffer = buffer.substring(eventEnd + 2);
                 const dataLines = event.split('\n')
                     .filter(line => line.startsWith('data:'))
-                    .map(line => line.substring(5).replace(/^ /, ''));
+                    .map(line => line.substring(5));
 
                 if (dataLines.length > 0) onData(dataLines.join('\n'));
             }