diff --git a/sshkey.c b/sshkey.c
index 24023d0..c4a4b04 100644
--- a/sshkey.c
+++ b/sshkey.c
@@ -39,7 +39,9 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
+#ifdef HAVE_UTIL_H
 #include <util.h>
+#endif /* HAVE_UTIL_H */
 
 #include "ssh2.h"
 #include "ssherr.h"