diff --git a/framebuffer.h b/framebuffer.h
index 0ac75f7..515e1bd 100644
--- a/framebuffer.h
+++ b/framebuffer.h
@@ -2,6 +2,6 @@
 #define ROWS 25
 #define AREA ( COLUMNS * ROWS )
 
-void write_cell(const unsigned cell, const char c , const char fg_bg);
+void write_cell(unsigned cell, char c , char fg, char bg);
 
 void hello();
\ No newline at end of file