diff --git a/CMakeExternals/DCMTK.cmake b/CMakeExternals/DCMTK.cmake
index 324bb7f98e..2cb0358e7c 100644
--- a/CMakeExternals/DCMTK.cmake
+++ b/CMakeExternals/DCMTK.cmake
@@ -1,45 +1,46 @@
 #-----------------------------------------------------------------------------
 # DCMTK
 #-----------------------------------------------------------------------------
 
 IF(MITK_USE_DCMTK)
 
   # Sanity checks
   IF(DEFINED DCMTK_DIR AND NOT EXISTS ${DCMTK_DIR})
     MESSAGE(FATAL_ERROR "DCMTK_DIR variable is defined but corresponds to non-existing directory")
   ENDIF()
   
   SET(proj DCMTK)
   SET(proj_DEPENDENCIES )
   SET(DCMTK_DEPENDS ${proj})
 
   IF(NOT DEFINED DCMTK_DIR)
     IF(UNIX)
       SET(DCMTK_CXX_FLAGS "-fPIC")
       SET(DCMTK_C_FLAGS "-fPIC")
     ENDIF(UNIX)
     IF(DCMTK_DICOM_ROOT_ID)
       SET(DCMTK_CXX_FLAGS "${DCMTK_CXX_FLAGS} -DSITE_UID_ROOT=\\\"${DCMTK_DICOM_ROOT_ID}\\\"")
       SET(DCMTK_C_FLAGS "${DCMTK_CXX_FLAGS} -DSITE_UID_ROOT=\\\"${DCMTK_DICOM_ROOT_ID}\\\"")
     ENDIF()
     ExternalProject_Add(${proj}
       URL http://mitk.org/download/thirdparty/dcmtk-3.6.0.tar.gz
       INSTALL_DIR ${proj}-install
+      PATCH_COMMAND ${CMAKE_COMMAND} -DTEMPLATE_FILE:FILEPATH=${MITK_SOURCE_DIR}/CMakeExternals/EmptyFileForPatching.dummy -P ${MITK_SOURCE_DIR}/CMakeExternals/PatchDCMTK.cmake 
       CMAKE_GENERATOR ${gen}
       CMAKE_ARGS
          ${ep_common_args}
          -DDCMTK_OVERWRITE_WIN32_COMPILER_FLAGS:BOOL=OFF
          -DBUILD_SHARED_LIBS:BOOL=OFF
          "-DCMAKE_CXX_FLAGS:STRING=${ep_common_CXX_FLAGS} ${DCMTK_CXX_FLAGS}"
          "-DCMAKE_C_FLAGS:STRING=${ep_common_C_FLAGS} ${DCMTK_C_FLAGS}"
          -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/${proj}-install
       DEPENDS ${proj_DEPENDENCIES}
       )
     SET(DCMTK_DIR ${CMAKE_CURRENT_BINARY_DIR}/${proj}-install)
     
   ELSE()
   
     mitkMacroEmptyExternalProject(${proj} "${proj_DEPENDENCIES}")
   
   ENDIF()
 ENDIF()     
diff --git a/CMakeExternals/EmptyFileForPatching.dummy b/CMakeExternals/EmptyFileForPatching.dummy
new file mode 100644
index 0000000000..d20bf55bfb
--- /dev/null
+++ b/CMakeExternals/EmptyFileForPatching.dummy
@@ -0,0 +1 @@
+@CONTENTS@
diff --git a/CMakeExternals/PatchDCMTK.cmake b/CMakeExternals/PatchDCMTK.cmake
new file mode 100644
index 0000000000..88a21613de
--- /dev/null
+++ b/CMakeExternals/PatchDCMTK.cmake
@@ -0,0 +1,15 @@
+# Called by DCMTK.cmake (ExternalProject_Add) as a patch for DCMTK.
+# Makes pdf2dcm use "DOC" as modality for Encapsulated PDFs
+
+#message ("Patching dcmdata/apps/pdf2dcm.cc to use modality 'DOC'. Using template ${TEMPLATE_FILE}")
+
+# read whole file
+file(STRINGS dcmdata/apps/pdf2dcm.cc sourceCode NEWLINE_CONSUME)
+
+# substitute "OT" for "DOC" (only single occurence where modality tag is set)
+string(REGEX REPLACE "\"OT\"" "\"DOC\"" sourceCode ${sourceCode})
+
+# set variable CONTENTS, which is substituted in TEMPLATE_FILE
+set(CONTENTS ${sourceCode})
+configure_file(${TEMPLATE_FILE} dcmdata/apps/pdf2dcm.cc @ONLY)
+