diff --git a/include/private/soci-vector-helpers.h b/include/private/soci-vector-helpers.h
index c4b2ec270..bcb834b88 100644
--- a/include/private/soci-vector-helpers.h
+++ b/include/private/soci-vector-helpers.h
@@ -162,35 +162,6 @@ inline std::string& vector_string_value(exchange_type e, void *data, std::size_t
     throw soci_error("Can't get the string value from the vector of values with non-supported type.");
 }
 
-inline std::wstring& vector_wstring_value(exchange_type e, void* data, std::size_t ind)
-{
-    switch (e)
-    {
-    case x_stdwstring:
-        return exchange_vector_type_cast<x_stdwstring>(data).at(ind);
-    case x_stdstring:
-    case x_xmltype:
-    case x_longstring:
-    case x_char:
-    case x_wchar:
-    case x_int8:
-    case x_uint8:
-    case x_int16:
-    case x_uint16:
-    case x_int32:
-    case x_uint32:
-    case x_int64:
-    case x_uint64:
-    case x_double:
-    case x_stdtm:
-    case x_statement:
-    case x_rowid:
-    case x_blob:
-        break;
-    }
-    throw soci_error("Can't get the string value from the vector of values with non-supported type.");
-}
-
 } // namespace details
 
 } // namespace soci
diff --git a/src/backends/odbc/vector-into-type.cpp b/src/backends/odbc/vector-into-type.cpp
index 264e691a7..2f24880bb 100644
--- a/src/backends/odbc/vector-into-type.cpp
+++ b/src/backends/odbc/vector-into-type.cpp
@@ -342,7 +342,7 @@ void odbc_vector_into_type_backend::do_post_fetch_rows(
         {
             SQLLEN len = get_sqllen_from_vector_at(i);
 
-            std::wstring& value = vector_wstring_value(type_, data_, i);
+            std::wstring& value = exchange_vector_type_cast<x_stdwstring>(data_).at(i);
             if (len == -1)
             {
                 // Value is null.
diff --git a/src/backends/odbc/vector-use-type.cpp b/src/backends/odbc/vector-use-type.cpp
index 4dd39e4fe..dea240bec 100644
--- a/src/backends/odbc/vector-use-type.cpp
+++ b/src/backends/odbc/vector-use-type.cpp
@@ -262,7 +262,7 @@ void* odbc_vector_use_type_backend::prepare_for_bind(SQLUINTEGER &size,
             prepare_indicators(vecSize);
             for (std::size_t i = 0; i != vecSize; ++i)
             {
-                std::size_t sz = vector_wstring_value(type_, data_, i).length();
+                std::size_t sz = exchange_vector_type_cast<x_stdwstring>(data_).at(i).length();
                 set_sqllen_from_vector_at(i, static_cast<long>(sz) * sizeof(wchar_t));
                 maxSize = sz > maxSize ? sz : maxSize;
             }
@@ -275,7 +275,7 @@ void* odbc_vector_use_type_backend::prepare_for_bind(SQLUINTEGER &size,
             char *pos = buf_;
             for (std::size_t i = 0; i != vecSize; ++i)
             {
-                std::wstring& value = vector_wstring_value(type_, data_, i);
+                std::wstring& value = exchange_vector_type_cast<x_stdwstring>(data_).at(i);
                 std::memcpy(pos, value.c_str(), value.length() * sizeof(wchar_t));
                 pos += maxSize * sizeof(wchar_t);
             }