diff --git a/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
index 1f9cbbdc4..5ac646c0e 100644
--- a/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
+++ b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
@@ -72,6 +72,11 @@ The features known to this version of CMake are:
 
   .. _N2346: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm
 
+``cxx_enum_forward_declarations``
+  Enum forward declarations, as defined in N2764_.
+
+  .. _N2764: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf
+
 ``cxx_explicit_conversions``
   Explicit conversion operators, as defined in N2437_.
 
diff --git a/Modules/Compiler/GNU-CXX-FeatureTests.cmake b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
index 94a31c886..d1bd4a047 100644
--- a/Modules/Compiler/GNU-CXX-FeatureTests.cmake
+++ b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
@@ -29,6 +29,7 @@ set(_cmake_feature_test_cxx_user_literals "${GNU47_CXX11}")
 # TODO: Should be supported by GNU 4.6
 set(GNU46_CXX11 "${_oldestSupported} && __cplusplus >= 201103L")
 set(_cmake_feature_test_cxx_constexpr "${GNU46_CXX11}")
+set(_cmake_feature_test_cxx_enum_forward_declarations "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_nullptr "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_range_for "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_unrestricted_unions "${GNU46_CXX11}")
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 577aa3771..7c5ec8178 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -54,6 +54,7 @@
   F(cxx_defaulted_functions) \
   F(cxx_delegating_constructors) \
   F(cxx_deleted_functions) \
+  F(cxx_enum_forward_declarations) \
   F(cxx_explicit_conversions) \
   F(cxx_extern_templates) \
   F(cxx_final) \
diff --git a/Tests/CompileFeatures/cxx_enum_forward_declarations.cpp b/Tests/CompileFeatures/cxx_enum_forward_declarations.cpp
new file mode 100644
index 000000000..a7e144537
--- /dev/null
+++ b/Tests/CompileFeatures/cxx_enum_forward_declarations.cpp
@@ -0,0 +1,8 @@
+
+enum SomeEnum : short;
+
+void someFunc()
+{
+  SomeEnum value;
+  int i = value;
+}