diff --git a/Modules/Platform/UnixPaths.cmake b/Modules/Platform/UnixPaths.cmake
index 7cc5181ff..ea64b781d 100644
--- a/Modules/Platform/UnixPaths.cmake
+++ b/Modules/Platform/UnixPaths.cmake
@@ -12,6 +12,16 @@
 # (To distributed this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
+# Block multiple inclusion because "CMakeCInformation.cmake" includes
+# "Platform/${CMAKE_SYSTEM_NAME}" even though the generic module
+# "CMakeSystemSpecificInformation.cmake" already included it.
+# The extra inclusion is a work-around documented next to the include()
+# call, so this can be removed when the work-around is removed.
+IF(__UNIX_PATHS_INCLUDED)
+  RETURN()
+ENDIF()
+SET(__UNIX_PATHS_INCLUDED 1)
+
 SET(UNIX 1)
 
 # also add the install directory of the running cmake to the search directories
diff --git a/Modules/Platform/WindowsPaths.cmake b/Modules/Platform/WindowsPaths.cmake
index 009f56b16..8c67175c2 100644
--- a/Modules/Platform/WindowsPaths.cmake
+++ b/Modules/Platform/WindowsPaths.cmake
@@ -12,6 +12,16 @@
 # (To distributed this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
+# Block multiple inclusion because "CMakeCInformation.cmake" includes
+# "Platform/${CMAKE_SYSTEM_NAME}" even though the generic module
+# "CMakeSystemSpecificInformation.cmake" already included it.
+# The extra inclusion is a work-around documented next to the include()
+# call, so this can be removed when the work-around is removed.
+IF(__WINDOWS_PATHS_INCLUDED)
+  RETURN()
+ENDIF()
+SET(__WINDOWS_PATHS_INCLUDED 1)
+
 # Add the program-files folder(s) to the list of installation
 # prefixes.
 #