--- CMakeLists.txt	2009-11-12 23:09:48.000000000 +0100
+++ CMakeLists2.txt	2010-02-05 18:08:06.000000000 +0100
@@ -38,10 +38,7 @@
 STRING(COMPARE EQUAL "${GDCM_SOURCE_DIR}" "${GDCM_BINARY_DIR}" INSOURCE)
 GET_FILENAME_COMPONENT(PARENTDIR ${GDCM_BINARY_DIR} PATH)
 STRING(COMPARE EQUAL "${GDCM_SOURCE_DIR}" "${PARENTDIR}" INSOURCESUBDIR)
-IF(INSOURCE OR INSOURCESUBDIR)
-  MESSAGE(FATAL_ERROR "GDCM requires an out of source Build. "
-    "Please create a separate binary directory and run CMake there.")
-ENDIF(INSOURCE OR INSOURCESUBDIR)
+
 
 #-----------------------------------------------------------------------------
 SET(GDCM_MAJOR_VERSION 2)