diff --git a/kernel/src/sys/stdio.cpp b/kernel/src/sys/stdio.cpp
index 28828a5a..6384cc5c 100644
--- a/kernel/src/sys/stdio.cpp
+++ b/kernel/src/sys/stdio.cpp
@@ -311,7 +311,7 @@ void sys_close(Context* context, int fd)
 {
     int err;
     Descriptor* file = Scheduler::current_task()->descriptor_from_fd(fd, err);
-    if (!err)
+    if (!file)
     {
         context->rax = -err;
         return;