diff --git a/src/humanize/i18n.py b/src/humanize/i18n.py
index 664b0742..534a7c67 100644
--- a/src/humanize/i18n.py
+++ b/src/humanize/i18n.py
@@ -17,11 +17,13 @@
 _THOUSANDS_SEPARATOR = {
     "de_DE": ".",
     "fr_FR": " ",
+    "pt_BR": ".",
 }
 
 # Mapping of locale to decimal separator
 _DECIMAL_SEPARATOR = {
     "de_DE": ",",
+    "pt_BR": ",",
 }
 
 
diff --git a/tests/test_i18n.py b/tests/test_i18n.py
index f8782f85..7af3ef24 100644
--- a/tests/test_i18n.py
+++ b/tests/test_i18n.py
@@ -53,6 +53,9 @@ def test_intcomma() -> None:
         humanize.i18n.activate("fr_FR")
         assert humanize.intcomma(number) == "10 000 000"
 
+        humanize.i18n.activate("pt_BR")
+        assert humanize.intcomma(number) == "10.000.000"
+
     except FileNotFoundError:
         pytest.skip("Generate .mo with scripts/generate-translation-binaries.sh")