--- Source/InformationObjectDefinition/CMakeLists.txt.orig	2012-09-21 12:05:25.000000000 +0200
+++ Source/InformationObjectDefinition/CMakeLists.txt	2012-09-21 12:05:39.000000000 +0200
@@ -37,6 +37,7 @@
   "${GDCM_SOURCE_DIR}/Source/DataStructureAndEncodingDefinition"
   "${GDCM_SOURCE_DIR}/Source/DataDictionary"
   "${GDCM_SOURCE_DIR}/Utilities"
+  "${EXPAT_INCLUDE_DIR}"
   )
 
 ADD_LIBRARY(gdcmIOD ${IOD_SRCS})