diff --git a/src/modules/SX126x/SX126x.h b/src/modules/SX126x/SX126x.h
index e1297adc..d66351bb 100644
--- a/src/modules/SX126x/SX126x.h
+++ b/src/modules/SX126x/SX126x.h
@@ -551,7 +551,7 @@ class SX126x: public PhysicalLayer {
       Overload with warm start enabled for PhysicalLayer compatibility.
       \returns \ref status_codes
     */
-    int16_t sleep(); 
+    int16_t sleep() override; 
     
     /*!
       \brief Sets the module to sleep mode. To wake the device up, call standby().