diff --git a/lib/dns/opensslrsa_link.c b/lib/dns/opensslrsa_link.c
index dc3d7e5aa1..624b082fb0 100644
--- a/lib/dns/opensslrsa_link.c
+++ b/lib/dns/opensslrsa_link.c
@@ -33,9 +33,10 @@
 
 #include <isc/entropy.h>
 #include <isc/md5.h>
+#include <isc/mem.h>
+#include <isc/safe.h>
 #include <isc/sha1.h>
 #include <isc/sha2.h>
-#include <isc/mem.h>
 #include <isc/string.h>
 #include <isc/util.h>