diff --git a/Modem/main.c b/Modem/main.c
index 7851ca4..a6fa726 100644
--- a/Modem/main.c
+++ b/Modem/main.c
@@ -96,7 +96,7 @@ int main(void)
 		
 		// If there was actually some data waiting for us
 		// there, let's se what it tastes like :)
-		if (ser_available(&ser)) {
+		if (!sertx && ser_available(&ser)) {
 			// We then read a byte from the serial port.
 			// Notice that we use "_nowait" since we can't
 			// have this blocking execution until a byte
diff --git a/buildrev.h b/buildrev.h
index b27b4ef..b3dc872 100644
--- a/buildrev.h
+++ b/buildrev.h
@@ -1,2 +1,2 @@
-#define VERS_BUILD 1598
+#define VERS_BUILD 1599
 #define VERS_HOST  "shard"