1 files changed, 6 insertions, 1 deletions
diff --git a/src/xcb_conn.c b/src/xcb_conn.c
index 725502a..9abd640 100644
--- a/src/xcb_conn.c
+++ b/src/xcb_conn.c
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <limits.h>
 
 #include "xcb.h"
 #include "xcbint.h"
@@ -204,7 +205,11 @@ static int write_vec(xcb_connection_t *c, struct iovec **vector, int *count)
          i++;
     }
 #else
-    n = writev(c->fd, *vector, *count);
+    n = *count;
+    if (n > UIO_MAXIOV)
+	n = UIO_MAXIOV;
+
+    n = writev(c->fd, *vector, n);
     if(n < 0 && errno == EAGAIN)
         return 1;
 #endif /* _WIN32 */