1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index ca8f934781..51c2ffcadc 100644
--- a/io.c
+++ b/io.c
@@ -35,7 +35,7 @@
 # define NO_LONG_FNAME
 #endif
 
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(sun) || defined(_nec_ews)
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(sun) || defined(_nec_ews)
 # define USE_SETVBUF
 #endif