diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 19c9e010d7c..1caf3076cec 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2017-02-13  Nathan Sidwell  <nathan@acm.org>
+
+	* gengtype-lex.l (<in_struct>): Add '/'.
+
 2017-02-13  Martin Liska  <mliska@suse.cz>
 
 	PR c/79471
diff --git a/gcc/gengtype-lex.l b/gcc/gengtype-lex.l
index 8eee652241c..17ead396689 100644
--- a/gcc/gengtype-lex.l
+++ b/gcc/gengtype-lex.l
@@ -159,7 +159,7 @@ CXX_KEYWORD inline|public:|private:|protected:|template|operator|friend|static
 }
 
 "..."				{ return ELLIPSIS; }
-[(){},*:<>;=%|+\!\?\.-]		{ return yytext[0]; }
+[(){},*:<>;=%/|+\!\?\.-]	{ return yytext[0]; }
 
    /* ignore pp-directives */
 ^{HWS}"#"{HWS}[a-z_]+[^\n]*\n   {lexer_line.line++;}