diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index ab6bbf3dd7..34ee220179 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -370,7 +370,7 @@ struct Field {
 using F=Field;
 
 namespace details {
-    class context_data;
+    struct context_data;
     SPDLOG_API std::shared_ptr<context_data>& threadlocal_context_head();
 }