diff --git a/mpw_parser.cpp b/mpw_parser.cpp
index a966089..e713200 100644
--- a/mpw_parser.cpp
+++ b/mpw_parser.cpp
@@ -1,3 +1,4 @@
+#include <algorithm>
 
 #include "mpw_parser.h"
 #include "phase3_parser.h"
diff --git a/mpw_parser.h b/mpw_parser.h
index 7a8022d..29a4f5b 100644
--- a/mpw_parser.h
+++ b/mpw_parser.h
@@ -4,7 +4,7 @@
 #include <string>
 #include <memory>
 
-#include "Environment.h"
+#include "environment.h"
 #include "fdset.h"
 
 #include "phase1.h"