diff --git a/makefiles/stdio.inc.mk b/makefiles/stdio.inc.mk
index 63f4ec8e86..462f902a96 100644
--- a/makefiles/stdio.inc.mk
+++ b/makefiles/stdio.inc.mk
@@ -37,6 +37,7 @@ endif
 ifneq (,$(filter stdio_uart_rx,$(USEMODULE)))
   USEMODULE += isrpipe
   USEMODULE += stdio_uart
+  USEMODULE += stdio_available
 endif
 
 ifneq (,$(filter stdio_uart,$(USEMODULE)))
diff --git a/sys/Kconfig.stdio b/sys/Kconfig.stdio
index f167e26988..b204e9b0fd 100644
--- a/sys/Kconfig.stdio
+++ b/sys/Kconfig.stdio
@@ -49,6 +49,7 @@ config MODULE_STDIO_UART_RX
     bool
     depends on MODULE_STDIO_UART
     select MODULE_ISRPIPE
+    select MODULE_STDIO_AVAILABLE
     default y if MODULE_STDIN
     help
         Reception when using UART-based STDIO needs to be enabled.
diff --git a/sys/stdio_uart/stdio_uart.c b/sys/stdio_uart/stdio_uart.c
index 21f715be5b..be6cd8e9b7 100644
--- a/sys/stdio_uart/stdio_uart.c
+++ b/sys/stdio_uart/stdio_uart.c
@@ -67,6 +67,13 @@ void stdio_init(void)
 #endif
 }
 
+#if IS_USED(MODULE_STDIO_AVAILABLE)
+int stdio_available(void)
+{
+    return tsrb_avail(&stdio_uart_isrpipe.tsrb);
+}
+#endif
+
 ssize_t stdio_read(void* buffer, size_t count)
 {
 #ifdef MODULE_STDIO_UART_RX