diff --git a/cores/esp32/esp32-hal-ledc.c b/cores/esp32/esp32-hal-ledc.c
index 4b5e136cbe6..014b08125f6 100644
--- a/cores/esp32/esp32-hal-ledc.c
+++ b/cores/esp32/esp32-hal-ledc.c
@@ -89,7 +89,7 @@ void ledcWrite(uint8_t chan, uint32_t duty)
     //Fixing if all bits in resolution is set = LEDC FULL ON
     uint32_t max_duty = (1 << channels_resolution[chan]) - 1;
 
-    if(duty == max_duty){
+    if((duty == max_duty) && (max_duty != 1)){
         duty = max_duty + 1;
     }