diff --git a/src/libcoreint/opcodes.c b/src/libcoreint/opcodes.c
index 38f5a1f04..256d3d387 100644
--- a/src/libcoreint/opcodes.c
+++ b/src/libcoreint/opcodes.c
@@ -469,7 +469,7 @@ function_declaration (int_data_t *int_data, /**< interpreter context */
 
   const opcode_counter_t function_code_begin_oc = (opcode_counter_t) (int_data->pos + 1);
 
-  int_data->pos = read_meta_opcode_counter (int_data);
+  int_data->pos = read_meta_opcode_counter (OPCODE_META_TYPE_FUNCTION_END, int_data);
 
   ecma_string_t *function_name_string_p = ecma_new_ecma_string_from_lit_index (function_name_lit_idx);
 
@@ -617,7 +617,7 @@ opfunc_func_expr_n (opcode_t opdata, /**< operation data */
 
   const opcode_counter_t function_code_begin_oc = (opcode_counter_t) (int_data->pos + 1);
 
-  int_data->pos = read_meta_opcode_counter (int_data);
+  int_data->pos = read_meta_opcode_counter (OPCODE_META_TYPE_FUNCTION_END, int_data);
 
   ecma_object_t *scope_p;
   ecma_string_t *function_name_string_p = NULL;
@@ -1742,11 +1742,12 @@ opfunc_meta (opcode_t opdata, /**< operation data */
                                          ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY),
                                          ECMA_TARGET_ID_RESERVED);
     }
+    case OPCODE_META_TYPE_UNDEFINED:
     case OPCODE_META_TYPE_THIS_ARG:
     case OPCODE_META_TYPE_VARG_PROP_DATA:
     case OPCODE_META_TYPE_VARG_PROP_GETTER:
     case OPCODE_META_TYPE_VARG_PROP_SETTER:
-    case OPCODE_META_TYPE_OPCODE_COUNTER:
+    case OPCODE_META_TYPE_FUNCTION_END:
     {
       JERRY_UNREACHABLE ();
     }
@@ -1778,10 +1779,11 @@ calc_meta_opcode_counter_from_meta_data (const idx_t data_1, /**< first data arg
  * that should be 'meta' opcode of type 'opcode counter'.
  */
 opcode_counter_t
-read_meta_opcode_counter (int_data_t *int_data) /**< interpreter context */
+read_meta_opcode_counter (opcode_meta_type expected_type, /**< expected type of meta opcode */
+                          int_data_t *int_data) /**< interpreter context */
 {
   opcode_t meta_opcode = read_opcode (int_data->pos);
-  JERRY_ASSERT (meta_opcode.data.meta.type == OPCODE_META_TYPE_OPCODE_COUNTER);
+  JERRY_ASSERT (meta_opcode.data.meta.type == expected_type);
 
   const idx_t data_1 = meta_opcode.data.meta.data_1;
   const idx_t data_2 = meta_opcode.data.meta.data_2;
diff --git a/src/libcoreint/opcodes.h b/src/libcoreint/opcodes.h
index 362dd27a0..d74175fd9 100644
--- a/src/libcoreint/opcodes.h
+++ b/src/libcoreint/opcodes.h
@@ -52,13 +52,14 @@ typedef enum
  */
 typedef enum
 {
+  OPCODE_META_TYPE_UNDEFINED, /**< undefined meta (should be rewritten) */
   OPCODE_META_TYPE_THIS_ARG, /**< value (var_idx) of this used during call */
   OPCODE_META_TYPE_VARG, /**< element (var_idx) of arguments' list */
   OPCODE_META_TYPE_VARG_PROP_DATA, /**< name (lit_idx) and value (var_idx) for a data property descriptor */
   OPCODE_META_TYPE_VARG_PROP_GETTER, /**< name (lit_idx) and getter (var_idx) for an accessor property descriptor */
   OPCODE_META_TYPE_VARG_PROP_SETTER, /**< name (lit_idx) and setter (var_idx) for an accessor property descriptor */
   OPCODE_META_TYPE_END_WITH, /**< end of with statement */
-  OPCODE_META_TYPE_OPCODE_COUNTER /**< opcode counter */
+  OPCODE_META_TYPE_FUNCTION_END /**< opcode counter */
 } opcode_meta_type;
 
 typedef struct
@@ -74,7 +75,7 @@ typedef struct
 } int_data_t;
 
 opcode_counter_t calc_meta_opcode_counter_from_meta_data (const idx_t data_1, const idx_t data_2);
-opcode_counter_t read_meta_opcode_counter (int_data_t *int_data);
+opcode_counter_t read_meta_opcode_counter (opcode_meta_type expected_type, int_data_t *int_data);
 
 #define OP_CALLS_AND_ARGS(p, a)                                              \
         p##_2 (a, call_0, lhs, name_lit_idx)                                 \
diff --git a/src/libjsparser/parser.c b/src/libjsparser/parser.c
index b37c521ed..11bd15bc6 100644
--- a/src/libjsparser/parser.c
+++ b/src/libjsparser/parser.c
@@ -895,7 +895,8 @@ parse_argument_list (argument_list_type alt, idx_t obj)
 }
 
 static void
-rewrite_meta_opcode_counter (opcode_counter_t meta_oc,
+rewrite_meta_opcode_counter (opcode_meta_type type,
+                             opcode_counter_t meta_oc,
                              opcode_counter_t new_value)
 {
   JERRY_STATIC_ASSERT (sizeof (idx_t) == 1);
@@ -905,7 +906,7 @@ rewrite_meta_opcode_counter (opcode_counter_t meta_oc,
 
   JERRY_ASSERT (new_value == calc_meta_opcode_counter_from_meta_data (data_1, data_2));
 
-  REWRITE_OPCODE_3 (meta_oc, meta, OPCODE_META_TYPE_OPCODE_COUNTER, data_1, data_2);
+  REWRITE_OPCODE_3 (meta_oc, meta, type, data_1, data_2);
 }
 
 /* function_declaration
@@ -931,7 +932,7 @@ parse_function_declaration (void)
   parse_argument_list (AL_FUNC_DECL, name);
 
   meta_oc = opcode_counter;
-  DUMP_OPCODE_3 (meta, OPCODE_META_TYPE_OPCODE_COUNTER, INVALID_VALUE, INVALID_VALUE);
+  DUMP_OPCODE_3 (meta, OPCODE_META_TYPE_UNDEFINED, INVALID_VALUE, INVALID_VALUE);
 
   token_after_newlines_must_be (TOK_OPEN_BRACE);
 
@@ -944,7 +945,7 @@ parse_function_declaration (void)
 
   DUMP_VOID_OPCODE (ret);
 
-  rewrite_meta_opcode_counter (meta_oc, opcode_counter);
+  rewrite_meta_opcode_counter (OPCODE_META_TYPE_FUNCTION_END, meta_oc, opcode_counter);
 }
 
 /* function_expression
@@ -973,7 +974,7 @@ parse_function_expression (void)
   lhs = parse_argument_list (AL_FUNC_EXPR, name);
 
   meta_oc = opcode_counter;
-  DUMP_OPCODE_3 (meta, OPCODE_META_TYPE_OPCODE_COUNTER, INVALID_VALUE, INVALID_VALUE);
+  DUMP_OPCODE_3 (meta, OPCODE_META_TYPE_UNDEFINED, INVALID_VALUE, INVALID_VALUE);
 
   token_after_newlines_must_be (TOK_OPEN_BRACE);
 
@@ -985,7 +986,7 @@ parse_function_expression (void)
   token_after_newlines_must_be (TOK_CLOSE_BRACE);
 
   DUMP_VOID_OPCODE (ret);
-  rewrite_meta_opcode_counter (meta_oc, opcode_counter);
+  rewrite_meta_opcode_counter (OPCODE_META_TYPE_FUNCTION_END, meta_oc, opcode_counter);
 
   return lhs;
 }