diff --git a/beancount_reds_plugins/capital_gains_classifier/long_short.py b/beancount_reds_plugins/capital_gains_classifier/long_short.py
index a57ec37..ec44c64 100644
--- a/beancount_reds_plugins/capital_gains_classifier/long_short.py
+++ b/beancount_reds_plugins/capital_gains_classifier/long_short.py
@@ -56,7 +56,7 @@ def is_interesting_entry(entry):
         return contains_generic(entry) and not contains_shortlong_postings(entry)
 
     def reductions(entry):
-        return [p for p in entry.postings if (p.cost and p.units.number and p.price)]
+        return [p for p in entry.postings if (p.cost and p.units.number and p.price != None)]
 
     def sale_type(p, entry_date):
         diff = relativedelta.relativedelta(entry_date, p.cost.date)
@@ -73,6 +73,8 @@ def sale_type(p, entry_date):
         if isinstance(entry, data.Transaction) and is_interesting_entry(entry):
             rewrite_count_matches += 1
             sale_types = [sale_type(p, entry.date) for p in reductions(entry)]
+            if not sale_types:
+                continue
             short_gains = sum(s[1] for s in sale_types if s[0] is False)
             long_gains = sum(s[1] for s in sale_types) - short_gains
 
diff --git a/beancount_reds_plugins/capital_gains_classifier/test_gain_loss.py b/beancount_reds_plugins/capital_gains_classifier/test_gain_loss.py
index a52a5d3..5134b04 100644
--- a/beancount_reds_plugins/capital_gains_classifier/test_gain_loss.py
+++ b/beancount_reds_plugins/capital_gains_classifier/test_gain_loss.py
@@ -15,7 +15,7 @@
    }"""
 
 
-class TestLongShort(cmptest.TestCase):
+class TestGainLoss(cmptest.TestCase):
 
     def test_empty_entries(self):
         entries, _ = gain_loss([], options.OPTIONS_DEFAULTS.copy(), config)
diff --git a/beancount_reds_plugins/capital_gains_classifier/test_long_short.py b/beancount_reds_plugins/capital_gains_classifier/test_long_short.py
index 62bdf15..9176b2e 100644
--- a/beancount_reds_plugins/capital_gains_classifier/test_long_short.py
+++ b/beancount_reds_plugins/capital_gains_classifier/test_long_short.py
@@ -302,3 +302,46 @@ def test_shortposition_reduction(self, entries, _, options_map):
           Assets:Bank         -50 USD
           Income:Capital-Gains:Long -50.00 USD
         """, new_entries)
+
+    @loader.load_doc()
+    def test_zero_missing_price(self, entries, _, options_map):
+        """
+        2014-01-01 open Assets:Brokerage
+        2014-01-01 open Assets:Bank
+        2014-01-01 open Income:Capital-Gains
+
+        2014-02-01 * "Buy"
+          Assets:Brokerage    100 ORNG {1 USD}
+          Assets:Bank        -100 USD
+
+        2016-03-01 * "Sell at complete loss"
+          Assets:Brokerage   -50 ORNG {1 USD} @ 0 USD
+          Income:Capital-Gains
+
+        2016-03-01 * "Sell but forgot price"
+          Assets:Brokerage   -50 ORNG {1 USD}
+          Assets:Bank 100 USD
+          Income:Capital-Gains
+        """
+        new_entries, _ = long_short(entries, options_map, config)
+
+        self.assertEqualEntries("""
+        2014-01-01 open Assets:Brokerage
+        2014-01-01 open Assets:Bank
+        2014-01-01 open Income:Capital-Gains
+        2014-01-01 open Income:Capital-Gains:Long
+
+        2014-02-01 * "Buy"
+          Assets:Brokerage    100 ORNG {1 USD}
+          Assets:Bank        -100 USD
+        
+        2016-03-01 * "Sell at complete loss"
+          Assets:Brokerage           -50 ORNG {1 USD, 2014-02-01} @ 0 USD
+          Income:Capital-Gains:Long   50 USD
+
+        2016-03-01 * "Sell but forgot price"
+          Assets:Brokerage      -50 ORNG {1 USD, 2014-02-01}
+          Assets:Bank           100 USD
+          Income:Capital-Gains  -50 USD
+
+        """, new_entries)