diff --git a/akode/akodeplay/akodeplay.cpp b/akode/akodeplay/akodeplay.cpp
index 321f189..c10a69e 100644
--- a/akode/akodeplay/akodeplay.cpp
+++ b/akode/akodeplay/akodeplay.cpp
@@ -25,6 +25,8 @@
 #include "../lib/sink.h"
 #include "../lib/decoder.h"
 
+#include <cstdlib>
+
 #ifdef HAVE_GNU_GETOPT
   #include <getopt.h>
 #else
diff --git a/akode/lib/auto_sink.cpp b/akode/lib/auto_sink.cpp
index 7d120f9..bcc1250 100644
--- a/akode/lib/auto_sink.cpp
+++ b/akode/lib/auto_sink.cpp
@@ -21,6 +21,7 @@
 #include "audioframe.h"
 #include "auto_sink.h"
 
+#include <cstdlib>
 #include <iostream>
 
 namespace aKode {