diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b595727..45798800 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 # [Unreleased]
-
+### Fixed
+- Internal BoM separator wasn't applied when using `use_alt`
 
 ## [0.8.0] - 2020-11-06
 ### Added
diff --git a/kibot/bom/bom.py b/kibot/bom/bom.py
index c02bc1f3..c9762817 100644
--- a/kibot/bom/bom.py
+++ b/kibot/bom/bom.py
@@ -198,7 +198,7 @@ class ComponentGroup(object):
         for n in self.components:
             P, N = (n.ref_prefix, _suffix_to_num(n.ref_suffix))
             S.add(P, N)
-        return S.flush(' ')
+        return S.flush(self.cfg.ref_separator)
 
     def update_field(self, field, value, ref=None):
         """ Update a given field, concatenates existing values and informs a collision """
diff --git a/tests/test_plot/test_int_bom.py b/tests/test_plot/test_int_bom.py
index 3993ce20..6dfac2fe 100644
--- a/tests/test_plot/test_int_bom.py
+++ b/tests/test_plot/test_int_bom.py
@@ -679,7 +679,7 @@ def test_int_bom_use_alt_2():
     ref_column = header.index(REF_COLUMN_NAME)
     qty_column = header.index(QTY_COLUMN_NAME)
     # R3 without footprint won't be merged with other 10K resistors
-    check_kibom_test_netlist(rows, ref_column, KIBOM_TEST_GROUPS+1, KIBOM_TEST_EXCLUDE, KIBOM_TEST_COMPONENTS_ALT2)
+    check_kibom_test_netlist(rows, ref_column, KIBOM_TEST_GROUPS+1, KIBOM_TEST_EXCLUDE, KIBOM_TEST_COMPONENTS_ALT2, ref_sep=';')
     check_dnc(rows, 'R7', ref_column, qty_column)
     ctx.clean_up()
 
diff --git a/tests/yaml_samples/int_bom_use_alt_2.kibot.yaml b/tests/yaml_samples/int_bom_use_alt_2.kibot.yaml
index dcf874d5..cdbf915e 100644
--- a/tests/yaml_samples/int_bom_use_alt_2.kibot.yaml
+++ b/tests/yaml_samples/int_bom_use_alt_2.kibot.yaml
@@ -9,5 +9,6 @@ outputs:
     dir: BoM
     options:
       use_alt: true
+      ref_separator: ;
       merge_blank_fields: false