diff --git a/mozilla/expat/xmlparse/xmlparse.c b/mozilla/expat/xmlparse/xmlparse.c
index 05bc60fab71..381f8264912 100644
--- a/mozilla/expat/xmlparse/xmlparse.c
+++ b/mozilla/expat/xmlparse/xmlparse.c
@@ -1180,8 +1180,8 @@ doContent(XML_Parser parser,
 	tag->rawName = s + enc->minBytesPerChar;
 	tag->rawNameLength = XmlNameLength(enc, tag->rawName);
 	if (nextPtr) {
-	  // Need to guarantee that:
-	  // tag->buf + ROUND_UP(tag->rawNameLength, sizeof(XML_Char)) <= tag->bufEnd - sizeof(XML_Char) 
+	  /* Need to guarantee that: */
+	  /* tag->buf + ROUND_UP(tag->rawNameLength, sizeof(XML_Char)) <= tag->bufEnd - sizeof(XML_Char) */
 	  if (tag->rawNameLength + (int)(sizeof(XML_Char) - 1) + (int)sizeof(XML_Char) > tag->bufEnd - tag->buf) {
 	    int bufSize = tag->rawNameLength * 4;
 	    bufSize = ROUND_UP(bufSize, sizeof(XML_Char));
diff --git a/mozilla/parser/expat/lib/xmlparse.c b/mozilla/parser/expat/lib/xmlparse.c
index 05bc60fab71..381f8264912 100644
--- a/mozilla/parser/expat/lib/xmlparse.c
+++ b/mozilla/parser/expat/lib/xmlparse.c
@@ -1180,8 +1180,8 @@ doContent(XML_Parser parser,
 	tag->rawName = s + enc->minBytesPerChar;
 	tag->rawNameLength = XmlNameLength(enc, tag->rawName);
 	if (nextPtr) {
-	  // Need to guarantee that:
-	  // tag->buf + ROUND_UP(tag->rawNameLength, sizeof(XML_Char)) <= tag->bufEnd - sizeof(XML_Char) 
+	  /* Need to guarantee that: */
+	  /* tag->buf + ROUND_UP(tag->rawNameLength, sizeof(XML_Char)) <= tag->bufEnd - sizeof(XML_Char) */
 	  if (tag->rawNameLength + (int)(sizeof(XML_Char) - 1) + (int)sizeof(XML_Char) > tag->bufEnd - tag->buf) {
 	    int bufSize = tag->rawNameLength * 4;
 	    bufSize = ROUND_UP(bufSize, sizeof(XML_Char));