diff --git a/src/system/kernel/fs/fd.c b/src/system/kernel/fs/fd.c
index 4a50ed194e..3e1c5059d0 100644
--- a/src/system/kernel/fs/fd.c
+++ b/src/system/kernel/fs/fd.c
@@ -242,6 +242,9 @@ dup2_fd(int oldfd, int newfd, bool kernel)
 		atomic_add(&context->fds[oldfd]->ref_count, 1);
 		atomic_add(&context->fds[oldfd]->open_count, 1);
 		context->fds[newfd] = context->fds[oldfd];
+
+		if (evicted == NULL)
+			context->num_used_fds++;
 	}
 
 	mutex_unlock(&context->io_mutex);
diff --git a/src/system/kernel/fs/vfs.cpp b/src/system/kernel/fs/vfs.cpp
index cd341c875d..7849440b6f 100644
--- a/src/system/kernel/fs/vfs.cpp
+++ b/src/system/kernel/fs/vfs.cpp
@@ -2903,6 +2903,7 @@ vfs_new_io_context(void *_parentContext)
 
 			if (descriptor != NULL && (descriptor->open_mode & O_CLOEXEC) == 0) {
 				context->fds[i] = descriptor;
+				context->num_used_fds++;
 				atomic_add(&descriptor->ref_count, 1);
 				atomic_add(&descriptor->open_count, 1);
 			}