diff --git a/sys/posix/fd.c b/sys/posix/fd.c
index fb13402a45..fd557357d1 100644
--- a/sys/posix/fd.c
+++ b/sys/posix/fd.c
@@ -21,7 +21,9 @@
 #include <string.h>
 
 #include "posix_io.h"
+#ifdef MODULE_UART0
 #include "board_uart0.h"
+#endif
 #include "unistd.h"
 
 #include "fd.h"
@@ -38,6 +40,7 @@ int fd_init(void)
 {
     memset(fd_table, 0, sizeof(fd_t) * FD_MAX);
 
+#ifdef MODULE_UART0
     posix_open(uart0_handler_pid, 0);
     fd_t fd = {
         .__active = 1,
@@ -49,6 +52,7 @@ int fd_init(void)
     memcpy(&fd_table[STDIN_FILENO], &fd, sizeof(fd_t));
     memcpy(&fd_table[STDOUT_FILENO], &fd, sizeof(fd_t));
     memcpy(&fd_table[STDERR_FILENO], &fd, sizeof(fd_t));
+#endif
     return FD_MAX;
 }