diff --git a/src/libecmaoperations/ecma-conversion.c b/src/libecmaoperations/ecma-conversion.c
index 577a19e6e..c693e46bc 100644
--- a/src/libecmaoperations/ecma-conversion.c
+++ b/src/libecmaoperations/ecma-conversion.c
@@ -403,6 +403,22 @@ ecma_number_to_uint32 (ecma_number_t value) /**< unsigned 32-bit integer value *
   return (uint32_t) value;
 } /* ecma_number_to_uint32 */
 
+/**
+ * ECMA-defined conversion of Number value to Int32 value
+ *
+ * See also:
+ *          ECMA-262 v5, 9.5
+ *
+ * @return number - result of conversion.
+ */
+int32_t
+ecma_number_to_int32 (ecma_number_t value) /**< unsigned 32-bit integer value */
+{
+  TODO(Implement according to ECMA);
+
+  return (int32_t) value;
+} /* ecma_number_to_int32 */
+
 /**
  * @}
  * @}
diff --git a/src/libecmaoperations/ecma-conversion.h b/src/libecmaoperations/ecma-conversion.h
index e780ef4be..d3a85ffb5 100644
--- a/src/libecmaoperations/ecma-conversion.h
+++ b/src/libecmaoperations/ecma-conversion.h
@@ -49,6 +49,7 @@ extern ecma_completion_value_t ecma_op_to_object (ecma_value_t value);
 extern ecma_number_t ecma_zt_string_to_number (const ecma_char_t *str_p);
 extern void ecma_op_to_string_uint32 (uint32_t value, ecma_char_t *out_buffer_p, size_t buffer_size);
 extern uint32_t ecma_number_to_uint32 (ecma_number_t value);
+extern int32_t ecma_number_to_int32 (ecma_number_t value);
 extern ecma_number_t ecma_uint32_to_number (uint32_t value);
 
 /**