diff --git a/arduino-debugger-extension/src/node/debug-adapter/cmsis-debug-session.ts b/arduino-debugger-extension/src/node/debug-adapter/cmsis-debug-session.ts
index 076e4122..97e2bda1 100644
--- a/arduino-debugger-extension/src/node/debug-adapter/cmsis-debug-session.ts
+++ b/arduino-debugger-extension/src/node/debug-adapter/cmsis-debug-session.ts
@@ -273,7 +273,7 @@ export class CmsisDebugSession extends GDBDebugSession {
         progressListener(0);
         this.gdbServer.on('progress', progressListener);
         await mi.sendTargetDownload(this.gdb);
-        this.gdbServer.off('progress', progressListener);
+        this.gdbServer.removeListener('progress', progressListener);
         progressListener(100);
 
         // Halt after image download