--- a/include/spdlog/details/pattern_formatter-inl.h	2019-10-06 13:13:26.000000000 +0300
+++ b/include/spdlog/details/pattern_formatter-inl.h	2020-01-07 10:05:01.333785629 +0200
@@ -24,6 +24,7 @@
 #include <thread>
 #include <utility>
 #include <vector>
+#include <cassert>
 
 namespace spdlog {
 namespace details {
--- a/include/spdlog/details/thread_pool-inl.h	2019-10-06 13:13:26.000000000 +0300
+++ b/include/spdlog/details/thread_pool-inl.h	2020-01-07 10:05:01.330452318 +0200
@@ -9,6 +9,8 @@
 
 #include "spdlog/common.h"
 
+#include <cassert>
+
 namespace spdlog {
 namespace details {