diff --git a/jerry-core/ecma/base/ecma-gc.c b/jerry-core/ecma/base/ecma-gc.c
index 77269092e..0be7836b0 100644
--- a/jerry-core/ecma/base/ecma-gc.c
+++ b/jerry-core/ecma/base/ecma-gc.c
@@ -38,9 +38,6 @@
 #include "ecma-promise-object.h"
 #endif
 
-#define JERRY_INTERNAL
-#include "jerry-internal.h"
-
 /* TODO: Extract GC to a separate component */
 
 /** \addtogroup ecma ECMA
diff --git a/jerry-core/ecma/operations/ecma-function-object.c b/jerry-core/ecma/operations/ecma-function-object.c
index 2184068d5..ff0f9ccf1 100644
--- a/jerry-core/ecma/operations/ecma-function-object.c
+++ b/jerry-core/ecma/operations/ecma-function-object.c
@@ -27,9 +27,6 @@
 #include "ecma-try-catch-macro.h"
 #include "jcontext.h"
 
-#define JERRY_INTERNAL
-#include "jerry-internal.h"
-
 /** \addtogroup ecma ECMA
  * @{
  *
@@ -539,12 +536,12 @@ ecma_op_function_call (ecma_object_t *func_obj_p, /**< Function object */
   else if (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION)
   {
     ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) func_obj_p;
+    jerry_external_handler_t handler_p = (jerry_external_handler_t) ext_func_obj_p->u.external_function;
 
-    ret_value = jerry_dispatch_external_function (func_obj_p,
-                                                  ext_func_obj_p->u.external_function,
-                                                  this_arg_value,
-                                                  arguments_list_p,
-                                                  arguments_list_len);
+    ret_value = handler_p (ecma_make_object_value (func_obj_p),
+                           this_arg_value,
+                           arguments_list_p,
+                           arguments_list_len);
   }
   else
   {
diff --git a/jerry-core/jerry-internal.h b/jerry-core/jerry-internal.h
deleted file mode 100644
index c1b60d58c..000000000
--- a/jerry-core/jerry-internal.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/* Copyright JS Foundation and other contributors, http://js.foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef JERRY_INTERNAL
- # error "The header is for Jerry's internal interfaces"
-#endif /* !JERRY_INTERNAL */
-
-#ifndef JERRY_INTERNAL_H
-#define JERRY_INTERNAL_H
-
-#include "ecma-globals.h"
-#include "jerryscript.h"
-
-ecma_value_t
-jerry_dispatch_external_function (ecma_object_t *function_object_p,
-                                  ecma_external_pointer_t handler_p,
-                                  ecma_value_t this_arg_value,
-                                  const ecma_value_t *arguments_list_p,
-                                  ecma_length_t arguments_list_len);
-
-void
-jerry_dispatch_object_free_callback (ecma_external_pointer_t freecb_p, ecma_external_pointer_t native_p);
-
-#endif /* !JERRY_INTERNAL_H */
diff --git a/jerry-core/jerry.c b/jerry-core/jerry.c
index 7ca8a74ec..83b53908f 100644
--- a/jerry-core/jerry.c
+++ b/jerry-core/jerry.c
@@ -35,9 +35,6 @@
 #include "js-parser.h"
 #include "re-compiler.h"
 
-#define JERRY_INTERNAL
-#include "jerry-internal.h"
-
 JERRY_STATIC_ASSERT (sizeof (jerry_value_t) == sizeof (ecma_value_t),
                      size_of_jerry_value_t_must_be_equal_to_size_of_ecma_value_t);
 
@@ -2151,51 +2148,3 @@ jerry_is_valid_cesu8_string (const jerry_char_t *cesu8_buf_p, /**< CESU-8 string
 /**
  * @}
  */
-
-/**
- * ====================== Internal functions ==========================
- */
-
-/**
- * Dispatch call to specified external function using the native handler
- *
- * Note:
- *      returned value must be freed with jerry_release_value, when it is no longer needed.
- *
- * @return returned ecma value of the invoked native function - if success
- *         thrown error - otherwise
- */
-ecma_value_t
-jerry_dispatch_external_function (ecma_object_t *function_object_p, /**< external function object */
-                                  ecma_external_pointer_t handler_p, /**< pointer to the function's native handler */
-                                  ecma_value_t this_arg_value, /**< 'this' argument */
-                                  const ecma_value_t *arguments_list_p, /**< arguments list */
-                                  ecma_length_t arguments_list_len) /**< arguments list length */
-{
-  jerry_assert_api_available ();
-
-  ecma_value_t ret_value = ((jerry_external_handler_t) handler_p) (ecma_make_object_value (function_object_p),
-                                                                   this_arg_value,
-                                                                   arguments_list_p,
-                                                                   arguments_list_len);
-  return ret_value;
-} /* jerry_dispatch_external_function */
-
-/**
- * Dispatch call to object's native free callback function
- *
- * Note:
- *       the callback is called during critical GC phase,
- *       so should not perform any requests to engine.
- */
-void
-jerry_dispatch_object_free_callback (ecma_external_pointer_t freecb_p, /**< pointer to free callback handler */
-                                     ecma_external_pointer_t native_p) /**< native handle, associated
-                                                                        *   with freed object */
-{
-  jerry_make_api_unavailable ();
-
-  ((jerry_object_free_callback_t) freecb_p) ((uintptr_t) native_p);
-
-  jerry_make_api_available ();
-} /* jerry_dispatch_object_free_callback */
diff --git a/jerry-core/jrt/jrt-fatals.c b/jerry-core/jrt/jrt-fatals.c
index 736aac5a3..d5d81706f 100644
--- a/jerry-core/jrt/jrt-fatals.c
+++ b/jerry-core/jrt/jrt-fatals.c
@@ -20,9 +20,6 @@
 #include "jrt.h"
 #include "jrt-libc-includes.h"
 
-#define JERRY_INTERNAL
-#include "jerry-internal.h"
-
 /*
  * Exit with specified status code.
  *