diff --git a/src/main/print-olympus.c b/src/main/print-olympus.c
index 42c4897..b11b020 100644
--- a/src/main/print-olympus.c
+++ b/src/main/print-olympus.c
@@ -40,6 +40,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <limits.h>
+#include <endian.h>
 
 #ifdef __GNUC__
 #define inline __inline__