diff --git a/drivers/cyw43/cyw43_ctrl.c b/drivers/cyw43/cyw43_ctrl.c
index 53601dac2..efd750e63 100644
--- a/drivers/cyw43/cyw43_ctrl.c
+++ b/drivers/cyw43/cyw43_ctrl.c
@@ -24,6 +24,7 @@
  * THE SOFTWARE.
  */
 
+#include <stdio.h>
 #include <string.h>
 
 #include "py/mphal.h"
diff --git a/drivers/cyw43/cyw43_lwip.c b/drivers/cyw43/cyw43_lwip.c
index 391dfbe90..f3ca59e3a 100644
--- a/drivers/cyw43/cyw43_lwip.c
+++ b/drivers/cyw43/cyw43_lwip.c
@@ -24,6 +24,7 @@
  * THE SOFTWARE.
  */
 
+#include <stdio.h>
 #include <string.h>
 
 #include "py/mphal.h"
diff --git a/drivers/cyw43/cywbt.c b/drivers/cyw43/cywbt.c
index 111cff158..fae661608 100644
--- a/drivers/cyw43/cywbt.c
+++ b/drivers/cyw43/cywbt.c
@@ -24,6 +24,7 @@
  * THE SOFTWARE.
  */
 
+#include <stdio.h>
 #include <string.h>
 
 #include "py/runtime.h"