diff --git a/lib/isc/unix/socket.c b/lib/isc/unix/socket.c
index f69f1d17de..d0267b8529 100644
--- a/lib/isc/unix/socket.c
+++ b/lib/isc/unix/socket.c
@@ -39,6 +39,7 @@
 #include <isc/log.h>
 #include <isc/mem.h>
 #include <isc/net.h>
+#include <isc/print.h>
 #include <isc/region.h>
 #include <isc/socket.h>
 #include <isc/task.h>