diff --git a/ports/dcmtk/CONTROL b/ports/dcmtk/CONTROL
index ad087563d3..1ae67841e3 100644
--- a/ports/dcmtk/CONTROL
+++ b/ports/dcmtk/CONTROL
@@ -1,3 +1,3 @@
 Source: dcmtk
-Version: 3.6.4
+Version: 3.6.4-1
 Description: This DICOM ToolKit (DCMTK) package consists of source code, documentation and installation instructions for a set of software libraries and applications implementing part of the DICOM/MEDICOM Standard.
diff --git a/ports/dcmtk/portfile.cmake b/ports/dcmtk/portfile.cmake
index cdf9b73e62..39a7dc2c8c 100644
--- a/ports/dcmtk/portfile.cmake
+++ b/ports/dcmtk/portfile.cmake
@@ -28,6 +28,8 @@ vcpkg_configure_cmake(
         -DDCMTK_ENABLE_PRIVATE_TAGS=ON
         -DBUILD_APPS=OFF
         -DDCMTK_ENABLE_CXX11=ON
+        -DDCMTK_WIDE_CHAR_FILE_IO_FUNCTIONS=ON
+        -DDCMTK_WIDE_CHAR_MAIN_FUNCTION=ON
         -DCMAKE_DEBUG_POSTFIX="d"
     OPTIONS_DEBUG
         -DINSTALL_HEADERS=OFF