diff --git a/cores/esp8266/core_esp8266_i2s.c b/cores/esp8266/core_esp8266_i2s.c
index 4582799dd..ec1dd42e7 100644
--- a/cores/esp8266/core_esp8266_i2s.c
+++ b/cores/esp8266/core_esp8266_i2s.c
@@ -1,5 +1,5 @@
 /* 
-  si2c.c - Software I2C library for esp8266
+  i2s.c - Software I2C library for esp8266
   
   Code taken and reworked from espessif's I2S example