1 files changed, 5 insertions, 0 deletions

diff --git a/src/arch/common.h b/src/arch/common.h
index a7c4a3b..973263f 100644
--- a/src/arch/common.h
+++ b/src/arch/common.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_COMMON_H
+#define ARCH_COMMON_H
+
 #define EOSHIFT     UINT8_C(4)
 #define COSHIFT     UINT8_C(5)
 
@@ -126,3 +129,5 @@ invcoord_epudsep_array(uint64_t c, uint8_t ret[8])
                 k -= is;
         }
 }
+
+#endif /* ARCH_COMMON_H */