diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index b95b254da01..93752307da4 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -352,7 +352,7 @@ layout		{
 		      return LAYOUT_TOK;
 		   } else {
 		      yylval->identifier = strdup(yytext);
-		      return IDENTIFIER;
+		      return classify_identifier(yyextra, yytext);
 		   }
 		}