diff --git a/include/pybind11/numpy.h b/include/pybind11/numpy.h
index b3888d3ca..5ec9aca47 100644
--- a/include/pybind11/numpy.h
+++ b/include/pybind11/numpy.h
@@ -18,7 +18,6 @@
 #include <cstdlib>
 #include <cstring>
 #include <functional>
-#include <iostream>
 #include <numeric>
 #include <sstream>
 #include <string>