diff --git a/Source/cmConfigure.cmake.h.in b/Source/cmConfigure.cmake.h.in
index 0824cdd4b..dd0362766 100644
--- a/Source/cmConfigure.cmake.h.in
+++ b/Source/cmConfigure.cmake.h.in
@@ -23,7 +23,6 @@
 #cmakedefine CMAKE_STRICT
 #define  CMAKE_ROOT_DIR "${CMake_SOURCE_DIR}"
 #define  CMAKE_BUILD_DIR "${CMake_BINARY_DIR}"
-#define  CMAKE_PREFIX "${CMAKE_INSTALL_PREFIX}"
 
 #define CMake_VERSION_MAJOR @CMake_VERSION_MAJOR@
 #define CMake_VERSION_MINOR @CMake_VERSION_MINOR@
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 84f4217e8..af13d3a30 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -841,14 +841,6 @@ int cmake::AddCMakePaths()
     cMakeRoot = CMAKE_ROOT_DIR;
     modules = cMakeRoot + "/Modules/CMake.cmake";
     }
-#endif
-#ifdef CMAKE_PREFIX
-  if (!cmSystemTools::FileExists(modules.c_str()))
-    {
-    // try compiled in install prefix
-    cMakeRoot = CMAKE_PREFIX CMAKE_DATA_DIR;
-    modules = cMakeRoot + "/Modules/CMake.cmake";
-    }
 #endif
   if (!cmSystemTools::FileExists(modules.c_str()))
     {