diff --git a/cores/rp2040/cyw43_wrappers.h b/cores/rp2040/cyw43_wrappers.h
index cdb1ec7dd..5a53569ee 100644
--- a/cores/rp2040/cyw43_wrappers.h
+++ b/cores/rp2040/cyw43_wrappers.h
@@ -23,11 +23,15 @@
 #include <pico/cyw43_driver.h>
 
 extern bool __isPicoW;
+#ifdef __cplusplus
 extern "C" {
-    void init_cyw43_wifi();
-    void __lockBluetooth();
-    void __unlockBluetooth();
-    void cyw43_pinMode(pin_size_t pin, PinMode mode);
-    void cyw43_digitalWrite(pin_size_t pin, PinStatus val);
-    PinStatus cyw43_digitalRead(pin_size_t pin);
+#endif
+void init_cyw43_wifi();
+void __lockBluetooth();
+void __unlockBluetooth();
+void cyw43_pinMode(pin_size_t pin, PinMode mode);
+void cyw43_digitalWrite(pin_size_t pin, PinStatus val);
+PinStatus cyw43_digitalRead(pin_size_t pin);
+#ifdef __cplusplus
 }
+#endif