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-rw-r--r--uart.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/uart.h b/uart.h
index 6430cb1..ec29d47 100644
--- a/uart.h
+++ b/uart.h
@@ -1,3 +1,6 @@
+#ifndef UART_H
+#define UART_H
+
#include <stddef.h>
#include <stdint.h>
#include <global.h>
@@ -39,3 +42,5 @@ void uart_init();
void uart_putc(unsigned char c);
unsigned char uart_getc();
void uart_puts(const char* str);
+
+#endif // UART_H