diff --git a/Learn/Simple Libraries/TextDevices/libfdserial/cmm/libfdserial.a b/Learn/Simple Libraries/TextDevices/libfdserial/cmm/libfdserial.a
index e7776c02..ee9fb264 100644
Binary files a/Learn/Simple Libraries/TextDevices/libfdserial/cmm/libfdserial.a and b/Learn/Simple Libraries/TextDevices/libfdserial/cmm/libfdserial.a differ
diff --git a/Learn/Simple Libraries/TextDevices/libfdserial/fdserial.c b/Learn/Simple Libraries/TextDevices/libfdserial/fdserial.c
index 495eb9de..b7a31763 100644
--- a/Learn/Simple Libraries/TextDevices/libfdserial/fdserial.c	
+++ b/Learn/Simple Libraries/TextDevices/libfdserial/fdserial.c	
@@ -143,7 +143,7 @@ int fdserial_txChar(fdserial *term, int txbyte)
   int rc = -1;
   fdserial_st *fdptr = (fdserial_st *) term->devst;
   //if(!fdptr->rxOnly)
-  if(fdptr->mode & FDSERIAL_MODE_RX_ONLY)
+  if(!(fdptr->mode & FDSERIAL_MODE_RX_ONLY))
   {    
     volatile fdserial_st* fdp = (fdserial_st*) term->devst;
     volatile char* txbuf = (volatile char*) fdp->buffptr + FDSERIAL_BUFF_MASK+1;
diff --git a/version.txt b/version.txt
index 051dfd6b..6b2e839f 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-v1.4.37
+v1.4.38