diff --git a/examples/pinproctest/pinproctest.cpp b/examples/pinproctest/pinproctest.cpp
index 1e368df..f06904f 100644
--- a/examples/pinproctest/pinproctest.cpp
+++ b/examples/pinproctest/pinproctest.cpp
@@ -375,6 +375,7 @@ void RunLoop(PRHandle proc)
             gettimeofday(&tv, NULL);
             printf("%d.%03d switch % 3d: %s\n", tv.tv_sec-startTime, tv.tv_usec/1000, event->value, stateText);
         }
+        PRFlushWriteData(proc);
         usleep(10*1000); // Sleep for 10ms so we aren't pegging the CPU.
     }
 }