diff --git a/fin_defs/data.py b/fin_defs/data.py
index 4200953..29a62ec 100644
--- a/fin_defs/data.py
+++ b/fin_defs/data.py
@@ -494,17 +494,18 @@ class AssetAmount:
     """
 
     asset: Asset
-    amount: Decimal
+    amount: Decimal | int
 
     def __post_init__(self):
         assert isinstance(self.asset, Asset), 'Incorrect value for self.asset'
-        assert isinstance(self.amount, Decimal), 'Incorrect value for self.amount'
+        assert isinstance(self.amount, Decimal | int), 'Incorrect value for self.amount'
 
     def __str__(self) -> str:
         return self.human_readable_str()
 
     def human_readable_str(self) -> str:
-        abs_amount = abs(self.amount)
+        amount = Decimal(self.amount)
+        abs_amount = abs(amount)
 
         # Determine specificity
         specificity = '3'
@@ -515,7 +516,7 @@ class AssetAmount:
 
         display = ASSET_DISPLAY.get(self.asset, UNKNOWN_ASSET_DISPLAY)
         return ('{sign}{prefix}{amount:.' + specificity + 'f}{suffix} {name}').format(
-            sign='-' if (self.amount == self.amount and self.amount < 0) else '',
+            sign='-' if (amount == amount and amount < 0) else '',
             prefix=display.prefix or '',
             suffix=f' {display.suffix}' if display.suffix else '',
             amount=abs_amount,