diff --git a/runtime/include/arch/context.h b/runtime/include/arch/context.h
index 392f214..0d1a03f 100644
--- a/runtime/include/arch/context.h
+++ b/runtime/include/arch/context.h
@@ -32,6 +32,7 @@
 /**
  * Restore a full mcontext
  * Writes sandbox_context to active_context
+ * active_context was saved to the stack by a signal handler
  * @param active_context - the context of the current worker thread
  * @param sandbox_context - the context that we want to restore
  */