diff --git a/infer/src/llvm/lLexer.mll b/infer/src/llvm/lLexer.mll
index 4ea44ec69..2ad880d0e 100644
--- a/infer/src/llvm/lLexer.mll
+++ b/infer/src/llvm/lLexer.mll
@@ -29,6 +29,9 @@ let id_special_char = ['-' '$' '.' '_']
 let id_char = lower | upper | id_special_char
 let id = id_char (id_char | digit)*
 
+(* definition of attribute group - not used for now *)
+let attribute_junk = "attributes" [^ '\n']*
+
 rule token = parse
   | space | comment { token lexbuf }
   | newline { token lexbuf }
@@ -158,4 +161,8 @@ rule token = parse
   | '%' (nonneg_int as i) { NUMBERED_LOCAL (int_of_string i) }
   | id as str { IDENT str }
 
+  (* attribute groups *)
+  | '#' (nonneg_int as i) { ATTRIBUTE_GROUP (int_of_string i) }
+  | attribute_junk { token lexbuf }
+
   | eof { EOF }
diff --git a/infer/src/llvm/lParser.mly b/infer/src/llvm/lParser.mly
index 6362f9446..bb09ac13c 100644
--- a/infer/src/llvm/lParser.mly
+++ b/infer/src/llvm/lParser.mly
@@ -132,6 +132,8 @@
 %token <int> NUMBERED_LOCAL
 %token <string> IDENT
 
+%token <int> ATTRIBUTE_GROUP
+
 %token EOF
 
 %start prog
@@ -146,8 +148,11 @@ prog:
   | defs = list(func_def) EOF { Prog defs }
 
 func_def:
-  | DEFINE ret_tp = ret_typ name = variable LPAREN params = separated_list(COMMA, pair(typ, IDENT)) RPAREN instrs = block {
-    FuncDef (name, ret_tp, params, instrs) }
+  | DEFINE ret_tp = ret_typ name = variable LPAREN params =
+    separated_list(COMMA, pair(typ, IDENT)) RPAREN list(attribute_group) instrs = block { FuncDef (name, ret_tp, params, instrs) }
+
+attribute_group:
+  | i = ATTRIBUTE_GROUP { i }
 
 ret_typ:
   | VOID { None }