diff --git a/modules/imgcodecs/src/bitstrm.cpp b/modules/imgcodecs/src/bitstrm.cpp
index 12d9c1bcae..a7e6380dfb 100644
--- a/modules/imgcodecs/src/bitstrm.cpp
+++ b/modules/imgcodecs/src/bitstrm.cpp
@@ -153,7 +153,7 @@ void  RBaseStream::setPos( int64_t pos )
 int64_t RBaseStream::getPos()
 {
     CV_Assert(isOpened());
-    int64_t pos = validateToInt64((m_current - m_start) + m_block_pos);
+    int64_t pos = static_cast<int64_t>((m_current - m_start) + m_block_pos);
     CV_Assert(pos >= m_block_pos); // overflow check
     CV_Assert(pos >= 0); // overflow check
     return pos;
diff --git a/modules/imgcodecs/src/utils.cpp b/modules/imgcodecs/src/utils.cpp
index cfbd62b7bc..41fd9f5041 100644
--- a/modules/imgcodecs/src/utils.cpp
+++ b/modules/imgcodecs/src/utils.cpp
@@ -51,13 +51,6 @@ int validateToInt(size_t sz)
     return valueInt;
 }
 
-int64_t validateToInt64(ptrdiff_t sz)
-{
-    int64_t valueInt = static_cast<int64_t>(sz);
-    CV_Assert((ptrdiff_t)valueInt == sz);
-    return valueInt;
-}
-
 #define  SCALE  14
 #define  cR  (int)(0.299*(1 << SCALE) + 0.5)
 #define  cG  (int)(0.587*(1 << SCALE) + 0.5)
diff --git a/modules/imgcodecs/src/utils.hpp b/modules/imgcodecs/src/utils.hpp
index f2649f0ecd..95deebde31 100644
--- a/modules/imgcodecs/src/utils.hpp
+++ b/modules/imgcodecs/src/utils.hpp
@@ -45,7 +45,6 @@
 namespace cv {
 
 int validateToInt(size_t step);
-int64_t validateToInt64(ptrdiff_t step);
 
 template <typename _Tp> static inline
 size_t safeCastToSizeT(const _Tp v_origin, const char* msg)