diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index 8c090d7b4d..0d829a6d5e 100644
--- a/libavfilter/vf_drawtext.c
+++ b/libavfilter/vf_drawtext.c
@@ -34,7 +34,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <time.h>
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 
 #if CONFIG_LIBFONTCONFIG
 #include <fontconfig/fontconfig.h>