diff --git a/src/BitStream.h b/src/BitStream.h
index 2fc7cd4..51a959c 100644
--- a/src/BitStream.h
+++ b/src/BitStream.h
@@ -5,6 +5,7 @@
 #define BIT_STREAM_H
 
 #include <vector>
+#include "CommonTypes.h"
 
 class BitStream
 {
diff --git a/src/CostTable.h b/src/CostTable.h
index c82f2fc..d59e375 100644
--- a/src/CostTable.h
+++ b/src/CostTable.h
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <vector>
+#include "CommonTypes.h"
 
 class CostTable
 {
diff --git a/src/Decompressor.cpp b/src/Decompressor.cpp
index b157a9a..8b28945 100644
--- a/src/Decompressor.cpp
+++ b/src/Decompressor.cpp
@@ -1,6 +1,7 @@
 // Copyright (c) 2021, Milos "baze" Bazelides
 // This code is licensed under the BSD 2-Clause License.
 
+#include <algorithm>
 #include "Compression.h"
 #include "UniversalCodes.h"
 
diff --git a/src/OptimalParser.cpp b/src/OptimalParser.cpp
index b23bd26..24bbd83 100644
--- a/src/OptimalParser.cpp
+++ b/src/OptimalParser.cpp
@@ -1,6 +1,7 @@
 // Copyright (c) 2021, Milos "baze" Bazelides
 // This code is licensed under the BSD 2-Clause License.
 
+#include <algorithm>
 #include "OptimalParser.h"
 #include "PrefixMatcher.h"