diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8600c557d..8fe86bfc1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -188,6 +188,8 @@ IF(EXISTS "${CMAKE_ROOT}/Modules/CPack.cmake")
   SET(CPACK_PACKAGE_VERSION_MINOR "${CMake_VERSION_MINOR}")
   SET(CPACK_PACKAGE_VERSION_PATCH "${CMake_VERSION_PATCH}")
   IF(WIN32 AND NOT UNIX)
+    # There is a bug in NSI that does not handle full unix paths properly. Make
+    # sure there is at least one set of four (4) backlasshes.
     SET(CPACK_PACKAGE_ICON "${CMake_SOURCE_DIR}/Utilities/Release\\\\CMakeInstall.bmp")
   ENDIF(WIN32 AND NOT UNIX)
   INCLUDE(CPack)