diff --git a/examples/json/json b/examples/json/json
deleted file mode 100755
index 4cc0df1..0000000
Binary files a/examples/json/json and /dev/null differ
diff --git a/examples/json/json.cpp b/examples/json/json.cpp
index 61106b8..1b339a8 100644
--- a/examples/json/json.cpp
+++ b/examples/json/json.cpp
@@ -1,6 +1,7 @@
 #include "json.h"
 #include <iostream>
 #include <algorithm>
+#include <cmath>
 
 namespace json {