diff --git a/payment_paypal/indico_payment_paypal/controllers.py b/payment_paypal/indico_payment_paypal/controllers.py
index 47bb534..9d332c0 100644
--- a/payment_paypal/indico_payment_paypal/controllers.py
+++ b/payment_paypal/indico_payment_paypal/controllers.py
@@ -92,12 +92,15 @@ class RHPaypalIPN(RH):
         return False
 
     def _verify_amount(self):
-        expected = self.registration.price
+        expected_amount = self.registration.price
+        expected_currency = self.registration.currency
         amount = float(request.form['mc_gross'])
-        if expected == amount:
+        currency = request.form['mc_currency']
+        if expected_amount == amount and expected_currency == currency:
             return True
-        current_plugin.logger.warning("Paid amount doesn't match event's fee: {} != {}".format(amount, expected))
-        notify_amount_inconsistency(self.registration, amount)
+        current_plugin.logger.warning("Payment doesn't match event's fee: {} {} != {} {}"
+                                      .format(amount, currency, expected_amount, expected_currency))
+        notify_amount_inconsistency(self.registration, amount, currency)
         return False
 
     def _is_transaction_duplicated(self):
diff --git a/payment_paypal/tests/controllers_test.py b/payment_paypal/tests/controllers_test.py
index 0491fb7..ba34e0b 100644
--- a/payment_paypal/tests/controllers_test.py
+++ b/payment_paypal/tests/controllers_test.py
@@ -41,17 +41,20 @@ def test_ipn_verify_business(business, expected, dummy_event):
 
 
 @pytest.mark.usefixtures('request_context')
-@pytest.mark.parametrize(('amount', 'expected'), (
-    ('13.37', True),
-    ('10.00', False)
+@pytest.mark.parametrize(('amount', 'currency', 'expected'), (
+    ('13.37', 'EUR', True),
+    ('13.37', 'CHF', False),
+    ('10.00', 'CHF', False),
+    ('10.00', 'CHF', False),
 ))
-def test_ipn_verify_amount(mocker, amount, expected):
+def test_ipn_verify_amount(mocker, amount, currency, expected):
     nai = mocker.patch('indico_payment_paypal.controllers.notify_amount_inconsistency')
     rh = RHPaypalIPN()
     rh.event = MagicMock(id=1)
     rh.registration = MagicMock()
     rh.registration.price = 13.37
-    request.form = {'mc_gross': amount}
+    rh.registration.currency = currency
+    request.form = {'mc_gross': amount, 'mc_currency': 'EUR'}
     with PaypalPaymentPlugin.instance.plugin_context():
         assert rh._verify_amount() == expected
         assert nai.called == (not expected)