1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/runtime/FancyTerminalEventHandler.java b/src/main/java/com/google/devtools/build/lib/runtime/FancyTerminalEventHandler.java
index 90975de9a5..1154c62f3c 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/FancyTerminalEventHandler.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/FancyTerminalEventHandler.java
@@ -128,7 +128,7 @@ public class FancyTerminalEventHandler extends BlazeCommandEventHandler {
   }
 
   @Override
-  public void handle(Event event) {
+  public synchronized void handle(Event event) {
     if (terminalClosed) {
       return;
     }