diff --git a/src/jpgimage.cpp b/src/jpgimage.cpp
index 865a4716..9247082a 100644
--- a/src/jpgimage.cpp
+++ b/src/jpgimage.cpp
@@ -1001,7 +1001,7 @@ int ExvImage::writeHeader(BasicIo& outIo) const {
   byte tmpBuf[7];
   tmpBuf[0] = 0xff;
   tmpBuf[1] = 0x01;
-  std::memcpy(tmpBuf + 2, exiv2Id_, 5);
+  std::copy_n(exiv2Id_, 5, tmpBuf + 2);
   if (outIo.write(tmpBuf, 7) != 7)
     return 4;
   if (outIo.error())
diff --git a/src/value.cpp b/src/value.cpp
index 728b0343..36b80451 100644
--- a/src/value.cpp
+++ b/src/value.cpp
@@ -471,7 +471,7 @@ size_t XmpValue::copy(byte* buf, ByteOrder /*byteOrder*/) const {
   write(os);
   std::string s = os.str();
   if (!s.empty())
-    std::memcpy(buf, s.data(), s.size());
+    std::copy_n(s.data(), s.size(), buf);
   return s.size();
 }