diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index b3b38ead9..e9c5a587e 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -359,40 +359,25 @@ IF (WIN32)
   ENDIF(NOT UNIX)
 ENDIF (WIN32)
 
-# Turn on Ninja by default, but disable it
-# on platforms where it does not pass all tests.
-# Enforce Ninja support by setting CMAKE_USE_NINJA
-set(_CMAKE_DEFAULT_NINJA_VALUE TRUE)
-if(APPLE)
-  SET(_CMAKE_DEFAULT_NINJA_VALUE TRUE)
-endif()
-SET(CMAKE_ENABLE_NINJA ${_CMAKE_DEFAULT_NINJA_VALUE} CACHE BOOL
-    "Enable the ninja generator for CMake. When enabled, some CMake tests still fail on OSX")
-MARK_AS_ADVANCED(CMAKE_ENABLE_NINJA)
-IF(CMAKE_ENABLE_NINJA)
-  MESSAGE(STATUS "Ninja generator enabled.")
-  SET(SRCS ${SRCS}
-    cmGlobalNinjaGenerator.cxx
-    cmGlobalNinjaGenerator.h
-    cmNinjaTypes.h
-    cmLocalNinjaGenerator.cxx
-    cmLocalNinjaGenerator.h
-    cmNinjaTargetGenerator.cxx
-    cmNinjaTargetGenerator.h
-    cmNinjaNormalTargetGenerator.cxx
-    cmNinjaNormalTargetGenerator.h
-    cmNinjaUtilityTargetGenerator.cxx
-    cmNinjaUtilityTargetGenerator.h
-    )
-  ADD_DEFINITIONS(-DCMAKE_USE_NINJA)
-  IF(WIN32 AND NOT CYGWIN AND NOT BORLAND)
-    SET_SOURCE_FILES_PROPERTIES(cmcldeps.cxx PROPERTIES COMPILE_DEFINITIONS _WIN32_WINNT=0x0501)
-    ADD_EXECUTABLE(cmcldeps cmcldeps.cxx)
-    TARGET_LINK_LIBRARIES(cmcldeps CMakeLib)
-    INSTALL_TARGETS(/bin cmcldeps)
-  ENDIF()
-ELSE()
-  MESSAGE(STATUS "Ninja generator disabled, enable it with -DCMAKE_ENABLE_NINJA=ON")
+# Ninja support
+SET(SRCS ${SRCS}
+  cmGlobalNinjaGenerator.cxx
+  cmGlobalNinjaGenerator.h
+  cmNinjaTypes.h
+  cmLocalNinjaGenerator.cxx
+  cmLocalNinjaGenerator.h
+  cmNinjaTargetGenerator.cxx
+  cmNinjaTargetGenerator.h
+  cmNinjaNormalTargetGenerator.cxx
+  cmNinjaNormalTargetGenerator.h
+  cmNinjaUtilityTargetGenerator.cxx
+  cmNinjaUtilityTargetGenerator.h
+  )
+IF(WIN32 AND NOT CYGWIN AND NOT BORLAND)
+  SET_SOURCE_FILES_PROPERTIES(cmcldeps.cxx PROPERTIES COMPILE_DEFINITIONS _WIN32_WINNT=0x0501)
+  ADD_EXECUTABLE(cmcldeps cmcldeps.cxx)
+  TARGET_LINK_LIBRARIES(cmcldeps CMakeLib)
+  INSTALL_TARGETS(/bin cmcldeps)
 ENDIF()
 
 # create a library used by the command line and the GUI
diff --git a/Source/cmExtraCodeBlocksGenerator.cxx b/Source/cmExtraCodeBlocksGenerator.cxx
index 5df8627d0..ad4ab76ee 100644
--- a/Source/cmExtraCodeBlocksGenerator.cxx
+++ b/Source/cmExtraCodeBlocksGenerator.cxx
@@ -60,9 +60,7 @@ cmExtraCodeBlocksGenerator::cmExtraCodeBlocksGenerator()
 // disable until somebody actually tests it:
 //  this->SupportedGlobalGenerators.push_back("MSYS Makefiles");
 #endif
-#ifdef CMAKE_USE_NINJA
   this->SupportedGlobalGenerators.push_back("Ninja");
-#endif
   this->SupportedGlobalGenerators.push_back("Unix Makefiles");
 }
 
diff --git a/Source/cmExtraEclipseCDT4Generator.cxx b/Source/cmExtraEclipseCDT4Generator.cxx
index ab113075d..78a87047a 100644
--- a/Source/cmExtraEclipseCDT4Generator.cxx
+++ b/Source/cmExtraEclipseCDT4Generator.cxx
@@ -34,9 +34,7 @@ cmExtraEclipseCDT4Generator
   this->SupportedGlobalGenerators.push_back("MinGW Makefiles");
 //  this->SupportedGlobalGenerators.push_back("MSYS Makefiles");
 #endif
-#ifdef CMAKE_USE_NINJA
   this->SupportedGlobalGenerators.push_back("Ninja");
-#endif
   this->SupportedGlobalGenerators.push_back("Unix Makefiles");
 
   this->SupportsVirtualFolders = true;
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 451aec8fa..fdc42fa2b 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -84,10 +84,8 @@
 #else
 #endif
 #include "cmGlobalUnixMakefileGenerator3.h"
+#include "cmGlobalNinjaGenerator.h"
 
-#ifdef CMAKE_USE_NINJA
-#  include "cmGlobalNinjaGenerator.h"
-#endif
 
 #if defined(CMAKE_HAVE_VS_GENERATORS)
 #include "cmCallVisualStudioMacro.h"
@@ -2600,10 +2598,8 @@ void cmake::AddDefaultGenerators()
 #endif
   this->Generators[cmGlobalUnixMakefileGenerator3::GetActualName()] =
     &cmGlobalUnixMakefileGenerator3::New;
-#ifdef CMAKE_USE_NINJA
   this->Generators[cmGlobalNinjaGenerator::GetActualName()] =
     &cmGlobalNinjaGenerator::New;
-#endif
 #ifdef CMAKE_USE_XCODE
   this->Generators[cmGlobalXCodeGenerator::GetActualName()] =
     &cmGlobalXCodeGenerator::New;