diff --git a/src/g_pch.h b/src/g_pch.h
index a22649815..2c3676f5a 100644
--- a/src/g_pch.h
+++ b/src/g_pch.h
@@ -12,6 +12,7 @@
 #include <zlib.h>
 #include <new>
 #include <algorithm>
+#include <forward_list>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <cassert>
diff --git a/src/p_map.cpp b/src/p_map.cpp
index ca83d342d..517327843 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -24,6 +24,7 @@
 
 #include <stdlib.h>
 #include <math.h>
+#include <algorithm>
 
 #include "templates.h"