diff --git a/lib/full-write.c b/lib/full-write.c
index 062f2b2c..246cd377 100644
--- a/lib/full-write.c
+++ b/lib/full-write.c
@@ -24,6 +24,8 @@
 
 #include <sys/types.h>
 
+#include "full-write.h"
+
 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif