diff --git a/coding/internal/file64_api.hpp b/coding/internal/file64_api.hpp
index 7600dfa28d..26d0f29650 100644
--- a/coding/internal/file64_api.hpp
+++ b/coding/internal/file64_api.hpp
@@ -7,7 +7,7 @@
   #define ftell64 _ftelli64
 
 #elif defined(OMIM_OS_TIZEN)
-  //STATIC_ASSERT(sizeof(_off64_t) == 8);
+  STATIC_ASSERT(sizeof(__off64_t) == 8);
   #define fseek64 fseeko64
   #define ftell64 ftello64