diff --git a/modules/contrib/src/inputoutput.cpp b/modules/contrib/src/inputoutput.cpp
index 9edf6a056f5ed9cc308458a7646f0dd5244341db..d0e947b33fe0cc66c8b379ea0992366e234db616 100644
--- a/modules/contrib/src/inputoutput.cpp
+++ b/modules/contrib/src/inputoutput.cpp
@@ -56,9 +56,9 @@ namespace cv
                         fname = FindFileData.cFileName;
                     #endif
                         if (addPath)
-                            list.push_back(path + "/" + std::string(fname));
+                            list.push_back(path + "/" + String(fname));
                         else
-                            list.push_back(std::string(fname));
+                            list.push_back(String(fname));
                     }
                 }
             #ifdef HAVE_WINRT
@@ -145,9 +145,9 @@ namespace cv
                     #endif
 
                         if (addPath)
-                            list.push_back(path + "/" + std::string(fname));
+                            list.push_back(path + "/" + String(fname));
                         else
-                            list.push_back(std::string(fname));
+                            list.push_back(String(fname));
                     }
                 }
             #ifdef HAVE_WINRT
diff --git a/modules/java/generator/src/cpp/Mat.cpp b/modules/java/generator/src/cpp/Mat.cpp
index bc5b87f4ee77e6b3a1b3ff501ecf4134d7d8ea8b..b3b0f66e72c405d073b214ab3f7db8ba13c0d25f 100644
--- a/modules/java/generator/src/cpp/Mat.cpp
+++ b/modules/java/generator/src/cpp/Mat.cpp
@@ -1,6 +1,7 @@
 #define LOG_TAG "org.opencv.core.Mat"
 
 #include <stdexcept>
+#include <string>
 
 #include "common.h"
 #include "opencv2/core.hpp"