diff --git a/examples/examples.cpp b/examples/examples.cpp
index 0835043..1771f6f 100644
--- a/examples/examples.cpp
+++ b/examples/examples.cpp
@@ -1,4 +1,6 @@
 #include <iostream>
+#define _USE_MATH_DEFINES
+#include <cmath>
 #include <AudioFile.h>
 
  //=======================================================================