diff --git a/CMakeLists.txt b/CMakeLists.txt
index add84a154..dded30344 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,6 +41,10 @@ endif()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
 
+# No in-source building
+include(MacroEnsureOutOfSourceBuild)
+macro_ensure_out_of_source_build("${PROJECT_NAME} requires an out-of-source build.  Create a build directory and run 'cmake ${CMAKE_SOURCE_DIR} [options]'.")
+
 include(cmake/basic_definitions.cmake)
 
 if(MSVC_VERSION)
diff --git a/cmake/MacroEnsureOutOfSourceBuild.cmake b/cmake/MacroEnsureOutOfSourceBuild.cmake
new file mode 100644
index 000000000..30560d626
--- /dev/null
+++ b/cmake/MacroEnsureOutOfSourceBuild.cmake
@@ -0,0 +1,39 @@
+# - MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)
+# MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)
+
+# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license:
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 
+# 1. Redistributions of source code must retain the copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products 
+#    derived from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+macro (MACRO_ENSURE_OUT_OF_SOURCE_BUILD _errorMessage)
+
+   string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" _insource)
+   if (_insource)
+     message(SEND_ERROR "${_errorMessage}")
+     message(FATAL_ERROR "Remove the file CMakeCache.txt in ${CMAKE_SOURCE_DIR} first.")
+   endif (_insource)
+
+endmacro (MACRO_ENSURE_OUT_OF_SOURCE_BUILD)