diff --git a/Modules/FindQt4.cmake b/Modules/FindQt4.cmake
index abbfc7287..91983eda8 100644
--- a/Modules/FindQt4.cmake
+++ b/Modules/FindQt4.cmake
@@ -1021,6 +1021,7 @@ IF (QT4_QMAKE_FOUND)
       FILE(RELATIVE_PATH rel ${CMAKE_CURRENT_SOURCE_DIR} ${infile})
     ENDIF(CMAKE_CURRENT_BINARY_DIR MATCHES "${_checkinfile}")
     SET(_outfile "${CMAKE_CURRENT_BINARY_DIR}/${rel}")
+    STRING(REPLACE ".." "__" _outfile ${_outfile})
     GET_FILENAME_COMPONENT(outpath ${_outfile} PATH)
     GET_FILENAME_COMPONENT(_outfile ${_outfile} NAME_WE)
     FILE(MAKE_DIRECTORY ${outpath})