diff --git a/fxg1a/edit.c b/fxg1a/edit.c
index 60286ad..65bff39 100644
--- a/fxg1a/edit.c
+++ b/fxg1a/edit.c
@@ -1,6 +1,7 @@
 #include <fxg1a.h>
 #include <stdio.h>
 #include <string.h>
+#include <endian.h>
 
 /* sign(): Sign header by filling fixed fields and checksums */
 void sign(struct g1a *g1a, size_t size)
diff --git a/fxg1a/util.c b/fxg1a/util.c
index 7dc3b72..f84aca5 100644
--- a/fxg1a/util.c
+++ b/fxg1a/util.c
@@ -1,4 +1,5 @@
 #include <string.h>
+#include <endian.h>
 #include <fxg1a.h>
 
 /*