diff --git a/src/libs/ephemeris/CMakeLists.txt b/src/libs/ephemeris/CMakeLists.txt
index 00d5cdf4..74865ccf 100644
--- a/src/libs/ephemeris/CMakeLists.txt
+++ b/src/libs/ephemeris/CMakeLists.txt
@@ -15,7 +15,8 @@ ADD_PLIB_INCLUDEDIR()
 ADD_SDL_INCLUDEDIR()
 
 IF(WIN32)
-    # What for ? Comment please !
+    # Inhibit definition of Macros min(a,b) and max(a,b) on Windows
+    # as the names conflict with the template functions from SGMisc.h
     ADD_DEFINITIONS(-DNOMINMAX)
 
     # DLL export stuff under Windows (to avoid .def file)