diff --git a/platform/posix/ftdi.cpp b/platform/posix/ftdi.cpp
index 3ba7445..eabb77c 100644
--- a/platform/posix/ftdi.cpp
+++ b/platform/posix/ftdi.cpp
@@ -108,6 +108,7 @@ bool FTDI::close() {
 	while(writeQueue.try_dequeue(flushop)) {}
 
 	closing = false;
+	disconnected = false;
 	return ret;
 }
 
diff --git a/platform/posix/stm32.cpp b/platform/posix/stm32.cpp
index 754e0bf..0f6ef3c 100644
--- a/platform/posix/stm32.cpp
+++ b/platform/posix/stm32.cpp
@@ -102,6 +102,7 @@ bool STM32::close() {
 		writeThread.join();
 
 	closing = false;
+	disconnected = false;
 
 	int ret = ::close(fd);
 	fd = -1;