diff --git a/kernel/module.c b/kernel/module.c
index 65586ff..88cec1d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1842,7 +1842,9 @@
 
 	/* We leave it in list to prevent duplicate loads, but make sure
 	 * that noone uses it while it's being deconstructed. */
+	mutex_lock(&module_mutex);
 	mod->state = MODULE_STATE_UNFORMED;
+	mutex_unlock(&module_mutex);
 
 	/* Remove dynamic debug info */
 	ddebug_remove_module(mod->name);