--- opencv-3.4.1/modules/core/include/opencv2/core/cvdef.h.orig	2018-02-28 10:16:45.000320632 +0000
+++ opencv-3.4.1/modules/core/include/opencv2/core/cvdef.h	2018-02-28 10:34:30.852346927 +0000
@@ -454,6 +454,7 @@ Cv64suf;
 
 
 // Integer types portatibility
+#if defined __cplusplus
 #ifdef OPENCV_STDINT_HEADER
 #include OPENCV_STDINT_HEADER
 #else
@@ -494,6 +495,9 @@ typedef ::uint64_t uint64_t;
 }
 #endif
 #endif
+#else
+#include <stdint.h>
+#endif
 
 
 //! @}