diff --git a/CMakeExternals/Patchtinyxml-2.6.2.cmake b/CMakeExternals/Patchtinyxml-2.6.2.cmake
index 0ecf539b30..619af635ef 100644
--- a/CMakeExternals/Patchtinyxml-2.6.2.cmake
+++ b/CMakeExternals/Patchtinyxml-2.6.2.cmake
@@ -1,18 +1,31 @@
 # Called by tinyxml.cmake (ExternalProject_Add) as a patch for tinyxml.
 # Adds #define TIXML_USE_STL to enable STL string support
 
+file(MD5 tinyxml.h tinyxmlhMD5)
+file(MD5 tinyxml.cpp tinyxmlcppMD5)
+
+IF(NOT ${tinyxmlhMD5} MATCHES 7f14e12e97d4b382589b4d982549c69b)
+  message( FATAL_ERROR "tinyxml.h does not match the desired hash. Patch will not be applied since tinyxml.h might have changed unexpectedly.")
+ENDIF(NOT ${tinyxmlhMD5} MATCHES 7f14e12e97d4b382589b4d982549c69b)
+
+IF(NOT ${tinyxmlcppMD5} MATCHES 6d8ae54d2c123cdce718f2e929d23b9f)
+  message( FATAL_ERROR "tinyxml.cpp does not match the desired hash. Patch will not be applied since tinyxml.cpp might have changed unexpectedly.")
+ENDIF(NOT ${tinyxmlcppMD5} MATCHES 6d8ae54d2c123cdce718f2e929d23b9f)
+
+
 configure_file(${CMAKE_CURRENT_LIST_DIR}/Patchtinyxml-2.6.2.h tinyxml.h COPYONLY)
 configure_file(${CMAKE_CURRENT_LIST_DIR}/Patchtinyxml-2.6.2.cpp tinyxml.cpp COPYONLY)
 
+
 # read whole file
 file(STRINGS tinyxml.h sourceCode NEWLINE_CONSUME)
 
 # Add the TIXML_USE_STL define
 string(REGEX REPLACE "#define TINYXML_INCLUDED" "#define TINYXML_INCLUDED\n\n#ifndef TIXML_USE_STL\n  #define TIXML_USE_STL\n#endif" sourceCode ${sourceCode})
 
 # set variable CONTENTS, which is substituted in TEMPLATE_FILE
 set(CONTENTS ${sourceCode})
 configure_file(${CMAKE_CURRENT_LIST_DIR}/EmptyFileForPatching.dummy tinyxml.h @ONLY)
 
 # Add the default CMake build system
 include(${CMAKE_CURRENT_LIST_DIR}/GenerateDefaultCMakeBuildSystem.cmake)