diff --git a/cmake/FindPyQt4.cmake b/cmake/FindPyQt4.cmake
index 9935c31c72c..37f645ea6c2 100644
--- a/cmake/FindPyQt4.cmake
+++ b/cmake/FindPyQt4.cmake
@@ -22,10 +22,10 @@
 #
 # PYQT4_SIP_FLAGS - The SIP flags used to build PyQt.
 
-IF(EXISTS PYQT4_VERSION_STR)
+IF(EXISTS PYQT4_VERSION)
   # Already in cache, be silent
   SET(PYQT4_FOUND TRUE)
-ELSE(EXISTS PYQT4_VERSION_STR)
+ELSE(EXISTS PYQT4_VERSION)
 
   FIND_FILE(_find_pyqt_py FindPyQt.py PATHS ${CMAKE_MODULE_PATH})
 
@@ -50,10 +50,4 @@ ELSE(EXISTS PYQT4_VERSION_STR)
     ENDIF(PYQT4_FIND_REQUIRED)
   ENDIF(PYQT4_FOUND)
 
-ENDIF(EXISTS PYQT4_VERSION_STR)
-
-STRING(REGEX REPLACE "^([0-9]*)\\.[0-9]*\\.[0-9]*$" "\\1" PYQT4_MAJOR_VERSION ${PYQT4_VERSION_STR})
-STRING(REGEX REPLACE "^[0-9]*\\.([0-9]*)\\.[0-9]*$" "\\1" PYQT4_MINOR_VERSION ${PYQT4_VERSION_STR})
-STRING(REGEX REPLACE "^[0-9]*\\.[0-9]*\\.([0-9]*)$" "\\1" PYQT4_PATCH_VERSION ${PYQT4_VERSION_STR})
-MATH( EXPR PYQT4_NUM_VERSION "${PYQT4_MAJOR_VERSION}*10000 + ${PYQT4_MINOR_VERSION}*100 + ${PYQT4_PATCH_VERSION}")
-
+ENDIF(EXISTS PYQT4_VERSION)
diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index dcc47eb6f1d..2dbe4a154f5 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -35,9 +35,9 @@ IF(MSVC)
   ADD_DEFINITIONS(-DNOMINMAX)
 ENDIF(MSVC)
 
-IF(${PYQT4_NUM_VERSION} LESS 40600)
+IF(PYQT4_VERSION_TAG LESS 263680)	# 0x040600
   SET(SIP_DISABLE_FEATURES ${SIP_DISABLE_FEATURES} PROXY_FACTORY)
-ENDIF(${PYQT4_NUM_VERSION} LESS 40600)
+ENDIF(PYQT4_VERSION_TAG LESS 263680)
 
 # core module
 FILE(GLOB sip_files_core core/*.sip)