1 files changed, 8 insertions, 3 deletions
diff --git a/src/kernel/vga.h b/src/kernel/vga.h
index 1e041df..1be2131 100644
--- a/src/kernel/vga.h
+++ b/src/kernel/vga.h
@@ -1,8 +1,13 @@
+#ifndef VGA_H
+#define VGA_H
+
 #include <stdint.h>
 
 void vga_set_color(uint8_t color);
 void vga_blank();
 void vga_scroll();
-void vga_printch(uint8_t ch);
-void vga_printsz(uint8_t *sz);
-void vga_printsn(uint8_t *sn, uint8_t n);
-\ No newline at end of file
+void vga_printch(char ch);
+void vga_printsz(char *sz);
+void vga_printsn(char *sn, uint8_t n);
+
+#endif
+\ No newline at end of file