diff --git a/src/apps/bin/chkbfs/chkbfs.cpp b/src/apps/bin/chkbfs/chkbfs.cpp
index 89ae65f8f7..21f1c9c576 100644
--- a/src/apps/bin/chkbfs/chkbfs.cpp
+++ b/src/apps/bin/chkbfs/chkbfs.cpp
@@ -122,6 +122,7 @@ main(int argc, char **argv)
 		return -1;
 	}
 
+	control.magic = BFS_IOCTL_CHECK_MAGIC;
 	control.flags = BFS_FIX_BITMAP_ERRORS;
 
 	while (*++argv)
diff --git a/src/tests/add-ons/kernel/file_systems/bfs/bfs_shell/additional_commands.c b/src/tests/add-ons/kernel/file_systems/bfs/bfs_shell/additional_commands.c
index 03b3c89f8d..bd22b934b4 100644
--- a/src/tests/add-ons/kernel/file_systems/bfs/bfs_shell/additional_commands.c
+++ b/src/tests/add-ons/kernel/file_systems/bfs/bfs_shell/additional_commands.c
@@ -28,6 +28,7 @@ do_chkbfs(int argc, char **argv)
 	}
 
 	memset(&result, 0, sizeof(result));
+	result.magic = BFS_IOCTL_CHECK_MAGIC;
 	result.flags = argc > 1 ? BFS_FIX_BITMAP_ERRORS : 0;
 	if (argc > 2) {
 		printf("will fix any severe errors!\n");