diff --git a/src_main/thread/pithread.cpp b/src_main/thread/pithread.cpp
index d5b08090..0ad05b1c 100755
--- a/src_main/thread/pithread.cpp
+++ b/src_main/thread/pithread.cpp
@@ -189,6 +189,8 @@ PIThread::~PIThread() {
 	if (!running_ || PRIVATE->thread == 0) return;
 #ifdef FREERTOS
 	piCout << "FREERTOS can't terminate pthreads!";
+	void * ret(0);
+	pthread_join(PRIVATE->thread, &ret);
 #endif
 #ifndef WINDOWS
 #  ifdef ANDROID