diff --git a/src/lib/fd.c b/src/lib/fd.c
index 255447e9c..ecb554c4e 100644
--- a/src/lib/fd.c
+++ b/src/lib/fd.c
@@ -472,7 +472,7 @@ int get_tty_fd(FILE* ttyfp){
     if((fd = fileno(ttyfp)) < 0){
       logwarn("No file descriptor was available in outfp %p\n", ttyfp);
     }else{
-      if(isatty(fd)){
+      if(tty_check(fd)){
         fd = dup(fd);
       }else{
         loginfo("fd %d not a TTY\n", fd);
@@ -485,7 +485,7 @@ int get_tty_fd(FILE* ttyfp){
     if(fd < 0){
       loginfo("Error opening /dev/tty (%s)\n", strerror(errno));
     }else{
-      if(!isatty(fd)){
+      if(!tty_check(fd)){
         loginfo("File descriptor for /dev/tty (%d) is not actually a TTY\n", fd);
         close(fd);
         fd = -1;