diff --git a/src/fuse_open.cpp b/src/fuse_open.cpp
index 41fff404..dad8893e 100644
--- a/src/fuse_open.cpp
+++ b/src/fuse_open.cpp
@@ -279,6 +279,7 @@ namespace FUSE
     ffi_->noflush = !l::calculate_flush(cfg->flushonclose,
                                         ffi_->flags);
 
+    ffi_->flags |= O_RDWR;
     rv = l::open(cfg->func.open.policy,
                  cfg->branches,
                  fusepath_,