1 files changed, 5 insertions, 0 deletions
diff --git a/rom.h b/rom.h
index a52bda1..703fabd 100644
--- a/rom.h
+++ b/rom.h
@@ -1,3 +1,6 @@
+#ifndef ROM_H
+#define ROM_H
+
 enum screen_mirroring {
 	M_HORIZONTAL,
 	M_VERTICAL,
@@ -15,3 +18,5 @@ struct Rom {
 
 void parse_rom(const uint8_t *data, size_t data_len, struct Rom *rom);
 void free_rom(struct Rom *rom);
+
+#endif /* ROM_H */