diff --git a/brmbar3/brmbar/Account.py b/brmbar3/brmbar/Account.py
index d474e6c..3186dcc 100644
--- a/brmbar3/brmbar/Account.py
+++ b/brmbar3/brmbar/Account.py
@@ -45,7 +45,7 @@ class Account:
         return cls(db, name = name, id = id, currency = currency, acctype = acctype)
 
     def balance(self):
-        crbalance = self.db.execute_and_fetch("SELECT crbalance FROM accounts WHERE account = %s", [self.id])
+        crbalance = self.db.execute_and_fetch("SELECT crbalance FROM accounts WHERE id = %s", [self.id])
         crbalance = crbalance[0] or 0
         return crbalance
 
@@ -66,7 +66,7 @@ class Account:
         """ Common part of credit() and debit(). """
         self.db.execute("INSERT INTO transaction_splits (transaction, side, account, amount, memo) VALUES (%s, %s, %s, %s, %s)", [transaction, side, self.id, amount, memo])
 
-        self.db.execute("UPDATE accounts set crbalance = crbalance - (CASE WHEN %s = 'credit' THEN -amount ELSE amount END)", [side])
+        self.db.execute("UPDATE accounts set crbalance = crbalance + (CASE WHEN %s = 'credit' THEN -amount ELSE amount END)", [side])
 
     def add_barcode(self, barcode):
         self.db.execute("INSERT INTO barcodes (account, barcode) VALUES (%s, %s)", [self.id, barcode])
diff --git a/brmbar3/brmbar/Shop.py b/brmbar3/brmbar/Shop.py
index a170fcd..b5c61dc 100644
--- a/brmbar3/brmbar/Shop.py
+++ b/brmbar3/brmbar/Shop.py
@@ -106,7 +106,7 @@ class Shop:
         # We assume all debt accounts share a currency
         sumselect = """
             SELECT SUM(crbalance)
-                FROM accounts WHERE acctype = %s AND
+                FROM accounts WHERE acctype = %s
         """
         cur = self.db.execute_and_fetch(sumselect, ["debt"])
         cur = cur[0] or 0