diff --git a/modules/softcascade/src/precomp.hpp b/modules/softcascade/src/precomp.hpp
index ac8eed4e4..83ba65b4b 100644
--- a/modules/softcascade/src/precomp.hpp
+++ b/modules/softcascade/src/precomp.hpp
@@ -43,6 +43,8 @@
 #ifndef __OPENCV_PRECOMP_H__
 #define __OPENCV_PRECOMP_H__
 
+#include <iostream>
+
 #include "opencv2/softcascade.hpp"
 #include "opencv2/imgproc.hpp"