diff --git a/slave/SPISlave.h b/slave/SPISlave.h
index c5f11f2..1bf9dc2 100644
--- a/slave/SPISlave.h
+++ b/slave/SPISlave.h
@@ -26,10 +26,6 @@ void DrawCircleCommand(char *symbols, int lenght);
 void DrawRectangleCommand(char *symbols, int lenght);
 void DrawCharCommand(char *symbols, int lenght);
 
-
-char CRC8(char *data, int length);
-char checkArray(char *arr, int size);
-
 char crc8(char *data, int len);
 
 #ifdef __cplusplus