diff --git a/include/spdlog/pattern_formatter-inl.h b/include/spdlog/pattern_formatter-inl.h
index 60622e9b..c3852689 100644
--- a/include/spdlog/pattern_formatter-inl.h
+++ b/include/spdlog/pattern_formatter-inl.h
@@ -21,9 +21,7 @@
 #include <ctime>
 #include <iterator>
 #include <memory>
-#include <mutex>
 #include <string>
-#include <thread>
 #include <utility>
 #include <vector>