diff --git a/fuse_sideload/fuse_sideload.cpp b/fuse_sideload/fuse_sideload.cpp
index b5b6ac1..3d94803 100644
--- a/fuse_sideload/fuse_sideload.cpp
+++ b/fuse_sideload/fuse_sideload.cpp
@@ -392,7 +392,7 @@
   }
 
   fd.ffd.reset(open("/dev/fuse", O_RDWR));
-  if (!fd.ffd) {
+  if (fd.ffd == -1) {
     perror("open /dev/fuse");
     result = -1;
     goto done;