diff --git a/Actuator/lcd.c b/Actuator/lcd.c
index 618641f8864123f1e17014b1fc04522fe698d405..4f85b73386ceff5c8427ac12153ae5c98b9eb668 100644
--- a/Actuator/lcd.c
+++ b/Actuator/lcd.c
@@ -24,8 +24,7 @@
 void lcd_init(void);
 void lcd_byte(int bits, int mode);
 void lcd_toggle_enable(int bits);
-void lcdLoc(int line);
-void typeln(const char *s);
+void lcd_write(int line, const char *s);
 int fd;  // seen by all subroutines
 
 //사람이 감지되면 센서로부터 '2'를 받음
@@ -196,4 +195,4 @@ void lcd_init()   {
   lcd_byte(0x0C, LCD_CMD);
   lcd_byte(0x28, LCD_CMD);
   lcd_byte(0x01, LCD_CMD);
-}
\ No newline at end of file
+}