diff --git a/platform/posix/stm32.cpp b/platform/posix/stm32.cpp
index 4067f8b..b8ffc87 100644
--- a/platform/posix/stm32.cpp
+++ b/platform/posix/stm32.cpp
@@ -200,9 +200,10 @@ bool STM32::open() {
 		return false;
 	}
 
-	struct termios tty;
+	struct termios tty = {};
+	struct termios compare = {};
 
-	if(tcgetattr(fd, &tty) < 0) {
+	if(tcgetattr(fd, &tty) != 0) {
 		close();
 		return false;
 	}
@@ -229,6 +230,11 @@ bool STM32::open() {
 		return false;
 	}
 
+	if(tcgetattr(fd, &compare) != 0 || memcmp(&tty, &compare, sizeof(struct termios)) != 0) {
+		close();
+		return false;
+	}
+
 	// Create threads
 	readThread = std::thread(&STM32::readTask, this);
 	writeThread = std::thread(&STM32::writeTask, this);