diff --git a/cores/esp8266/core_esp8266_wiring_pwm.c b/cores/esp8266/core_esp8266_wiring_pwm.c
index 22ff2663b..744a3e4c8 100644
--- a/cores/esp8266/core_esp8266_wiring_pwm.c
+++ b/cores/esp8266/core_esp8266_wiring_pwm.c
@@ -46,7 +46,7 @@ extern void __analogWriteFreq(uint32_t freq) {
 }
 
 extern void __analogWrite(uint8_t pin, int val) {
-  if (pin >= 16) {
+  if (pin > 16) {
     return;
   }
   uint32_t analogPeriod = 1000000L / analogFreq;