diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index 2afff09d..f0eace46 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -2878,7 +2878,7 @@ PUGI__NS_BEGIN
 	{
 		PUGI__STATIC_ASSERT(parse_escapes == 0x10 && parse_eol == 0x20 && parse_wconv_attribute == 0x40 && parse_wnorm_attribute == 0x80);
 
-		switch ((optmask >> 4) & 15) // get bitmask for flags (wconv wnorm eol escapes)
+		switch ((optmask >> 4) & 15) // get bitmask for flags (wnorm wconv eol escapes); this simultaneously checks 4 options from assertion above
 		{
 		case 0:  return strconv_attribute_impl<opt_false>::parse_simple;
 		case 1:  return strconv_attribute_impl<opt_true>::parse_simple;