diff --git a/file_system.go b/file_system.go
index d67fcee..60840ad 100644
--- a/file_system.go
+++ b/file_system.go
@@ -434,6 +434,7 @@ type SetInodeAttributesRequest struct {
 
 	// The attributes to modify, or nil for attributes that don't need a change.
 	Size *uint64
+	Mode *os.FileMode
 }
 
 type SetInodeAttributesResponse struct {
diff --git a/server.go b/server.go
index 811c34b..dddfc74 100644
--- a/server.go
+++ b/server.go
@@ -182,6 +182,10 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
 			req.Size = &typed.Size
 		}
 
+		if typed.Valid&bazilfuse.SetattrMode != 0 {
+			req.Mode = &typed.Mode
+		}
+
 		// Call the file system.
 		resp, err := s.fs.SetInodeAttributes(ctx, req)
 		if err != nil {