diff --git a/src/json.hpp b/src/json.hpp
index 1311080b..fa14b0e7 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -36,7 +36,6 @@ SOFTWARE.
 #include <ciso646>
 #include <cmath>
 #include <cstddef>
-#include <cstdio>
 #include <cstdint>
 #include <cstdlib>
 #include <functional>
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index a65e41bf..dd1bda1f 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -36,7 +36,6 @@ SOFTWARE.
 #include <ciso646>
 #include <cmath>
 #include <cstddef>
-#include <cstdio>
 #include <cstdint>
 #include <cstdlib>
 #include <functional>