add missing header

3b93faa0 · Benjamin Cumming · 4376306e · 3b93faa0
Commit 3b93faa0 authored 8 years ago by Benjamin Cumming
--- a/src/threading/serial.hpp
+++ b/src/threading/serial.hpp
@@ -4,6 +4,7 @@
    #error "this header can only be loaded if WITH_SERIAL is set"
 #endif

+#include <algorithm>
 #include <array>
 #include <chrono>
 #include <string>