diff --git a/Modules/FindQt4.cmake b/Modules/FindQt4.cmake
index 1e22bb14f..f97aeccc3 100644
--- a/Modules/FindQt4.cmake
+++ b/Modules/FindQt4.cmake
@@ -965,6 +965,9 @@ IF (QT4_QMAKE_FOUND)
     ELSE(_infileLength GREATER _binlength)
       FILE(RELATIVE_PATH rel ${CMAKE_CURRENT_SOURCE_DIR} ${infile})
     ENDIF(_infileLength GREATER _binlength)
+    IF(WIN32 AND rel MATCHES "^[a-zA-Z]:") # absolute path 
+      STRING(REGEX REPLACE "^([a-zA-Z]):(.*)$" "\\1_\\2" rel "${rel}")
+    ENDIF(WIN32 AND rel MATCHES "^[a-zA-Z]:") 
     SET(_outfile "${CMAKE_CURRENT_BINARY_DIR}/${rel}")
     STRING(REPLACE ".." "__" _outfile ${_outfile})
     GET_FILENAME_COMPONENT(outpath ${_outfile} PATH)