diff --git a/scripts/genksyms/lex.l b/scripts/genksyms/lex.l
index 5dc25ee01c77bcefa659efb1e420d9dec9c0b332..d29c774f51b615026b82ae22e44ce03a676e6dd9 100644
--- a/scripts/genksyms/lex.l
+++ b/scripts/genksyms/lex.l
@@ -292,7 +292,7 @@ repeat:
     case ST_TYPEOF_1:
       if (token == IDENT)
 	{
-	  if (is_reserved_word(yytext, yyleng)
+	  if (is_reserved_word(yytext, yyleng) >= 0
 	      || find_symbol(yytext, SYM_TYPEDEF, 1))
 	    {
 	      yyless(0);
diff --git a/scripts/genksyms/lex.lex.c_shipped b/scripts/genksyms/lex.lex.c_shipped
index d5a7474b3e57ea2fd4d114f73065a92f6248f770..ba2fda8dfdb2c62a25aae5dd11a6625f489fae28 100644
--- a/scripts/genksyms/lex.lex.c_shipped
+++ b/scripts/genksyms/lex.lex.c_shipped
@@ -2101,7 +2101,7 @@ repeat:
     case ST_TYPEOF_1:
       if (token == IDENT)
 	{
-	  if (is_reserved_word(yytext, yyleng)
+	  if (is_reserved_word(yytext, yyleng) >= 0
 	      || find_symbol(yytext, SYM_TYPEDEF, 1))
 	    {
 	      yyless(0);