diff --git a/calculate/templates/template_processor.py b/calculate/templates/template_processor.py
index e8289ce..16b3bc0 100644
--- a/calculate/templates/template_processor.py
+++ b/calculate/templates/template_processor.py
@@ -1028,8 +1028,12 @@ class TemplateExecutor:
                        or os.path.exists(input_path)):
                         # Если входной файл просто не из архива, или из архива
                         # и при этом существует -- используем его
-                        with open(input_path, 'r') as input_file:
-                            input_text = input_file.read()
+                        try:
+                            with open(input_path, 'r') as input_file:
+                                input_text = input_file.read()
+                        except UnicodeDecodeError:
+                            raise TemplateExecutorError(
+                                                  "can not join binary files.")
                     else:
                         # В противном случае используем пустой файл.
                         # TODO Подумать.
diff --git a/tests/templates/test_template_executor.py b/tests/templates/test_template_executor.py
index c4facf3..dc82da4 100644
--- a/tests/templates/test_template_executor.py
+++ b/tests/templates/test_template_executor.py
@@ -3042,6 +3042,27 @@ AttributeError: module 'os' has no attribute 'suspicious_attribute'
             out_text = out_file.read()
             assert out_text == expected_output
 
+    def test_error_while_using_not_text_file_as_input_file_for_append_join(self):
+        target_path = join_paths(CHROOT_PATH,
+                                 '/etc/append_join_file_testfiles/file_19')
+        source_path = join_paths(CHROOT_PATH,
+                                 '/etc/append_join_file_testfiles/logo.png')
+
+        parameters_object = ParametersContainer({'package': test_package_name,
+                                                 'append': 'join',
+                                                 'source': source_path,
+                                                 'format': 'raw'})
+
+        template_wrapper = TemplateWrapper(
+                                       target_path,
+                                       parameters_object, FILE,
+                                       '/path/to/template',
+                                       template_text='',
+                                       chroot_path=CHROOT_PATH,
+                                       config_archive_path=CONFIG_ARCHIVE_PATH)
+        with pytest.raises(TemplateExecutorError):
+            template_executor._append_join_file(template_wrapper)
+
     def test_to_remove_changed_testfiles(self):
         shutil.rmtree(os.path.join(CHROOT_PATH, 'etc'))
         shutil.rmtree(os.path.join(CHROOT_PATH, 'unprotected'))
diff --git a/tests/templates/testfiles/test_executor_root/etc.backup/append_join_file_testfiles/logo.png b/tests/templates/testfiles/test_executor_root/etc.backup/append_join_file_testfiles/logo.png
new file mode 100644
index 0000000..c1de580
Binary files /dev/null and b/tests/templates/testfiles/test_executor_root/etc.backup/append_join_file_testfiles/logo.png differ