diff --git a/src/jansson.hpp b/src/jansson.hpp
index 51c1763..f435493 100644
--- a/src/jansson.hpp
+++ b/src/jansson.hpp
@@ -11,6 +11,11 @@
 #include <ostream>
 #include <istream>
 #include <sstream>
+
+// Included so that standard functions don't end up in namespace json
+#include <cstdio>
+
+// For free()
 #include <cstdlib>
 
 namespace json {