diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index 9debbb00b..c48e6188d 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -656,9 +656,11 @@ int rk_flock(int fd, int operation);
 #ifdef HAVE_STRUCT_DIRENT_DD_FD
 #define dirfd(x) ((x)->dd_fd)
 #else
+#ifndef _WIN32 /* Windows code never calls dirfd */
 #error Missing dirfd() and ->dd_fd
 #endif
 #endif
+#endif
 
 ROKEN_LIB_FUNCTION time_t ROKEN_LIB_CALL tm2time (struct tm, int);