diff --git a/libtransmission/fdlimit.c b/libtransmission/fdlimit.c
index cf3fc249f..e009f3533 100644
--- a/libtransmission/fdlimit.c
+++ b/libtransmission/fdlimit.c
@@ -56,6 +56,7 @@
 #include <fcntl.h> /* O_LARGEFILE posix_fadvise */
 #include <unistd.h>
 
+#include <stdarg.h> /* some 1.4.x versions of evutil.h need this */
 #include <evutil.h>
 
 #include "transmission.h"