diff --git a/modules/dnn/src/precomp.hpp b/modules/dnn/src/precomp.hpp
index d06e337c1a..9383a08e33 100644
--- a/modules/dnn/src/precomp.hpp
+++ b/modules/dnn/src/precomp.hpp
@@ -41,6 +41,7 @@
 
 #include <opencv2/core.hpp>
 #include <opencv2/core/utils/trace.hpp>
+#include <opencv2/core/softfloat.hpp> // int32_t (MSVS 2010-2013)
 #include "cvconfig.h"
 #include <opencv2/dnn.hpp>
 #include <opencv2/dnn/all_layers.hpp>