1 files changed, 5 insertions, 0 deletions
diff --git a/68kinst.h b/68kinst.h
index 03da053..8b5a089 100644
--- a/68kinst.h
+++ b/68kinst.h
@@ -1,3 +1,6 @@
+#ifndef M68KINST_H_
+#define M68KINST_H_
+
 #include <stdint.h>
 
 typedef enum {
@@ -176,3 +179,5 @@ uint16_t * m68K_decode(uint16_t * istream, m68kinst * dst);
 uint32_t m68k_cycles(m68kinst * inst);
 int m68K_disasm(m68kinst * decoded, char * dst);
 
+#endif
+