diff --git a/src/contrib/m4adecoder/M4aDecoder.cpp b/src/contrib/m4adecoder/M4aDecoder.cpp
index 78551a986..c07c7f440 100644
--- a/src/contrib/m4adecoder/M4aDecoder.cpp
+++ b/src/contrib/m4adecoder/M4aDecoder.cpp
@@ -36,6 +36,7 @@
 #include "M4aDecoder.h"
 #include <cstring>
 #include <string>
+#include <stdlib.h>
 
 using musik::core::sdk::IDataStream;
 using musik::core::sdk::IBuffer;
diff --git a/src/core/debug.cpp b/src/core/debug.cpp
index 1ee72ce52..8569b3980 100755
--- a/src/core/debug.cpp
+++ b/src/core/debug.cpp
@@ -39,6 +39,7 @@
 #include <string>
 #include <queue>
 #include <thread>
+#include <mutex>
 #include <condition_variable>
 #include <memory>