diff --git a/lib/download.c b/lib/download.c
index d8c56b185c..68e6f308aa 100644
--- a/lib/download.c
+++ b/lib/download.c
@@ -44,6 +44,10 @@
 
 #include "setup.h"
 
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif