diff --git a/freqtrade/rpc/api_server/api_schemas.py b/freqtrade/rpc/api_server/api_schemas.py
index 10f181bb6..bbd858795 100644
--- a/freqtrade/rpc/api_server/api_schemas.py
+++ b/freqtrade/rpc/api_server/api_schemas.py
@@ -277,6 +277,7 @@ class ForceBuyPayload(BaseModel):
     pair: str
     price: Optional[float]
     ordertype: Optional[OrderTypeValues]
+    stakeamount: Optional[float]
 
 
 class ForceSellPayload(BaseModel):
diff --git a/freqtrade/rpc/api_server/api_v1.py b/freqtrade/rpc/api_server/api_v1.py
index 648ec6c57..4c430dd46 100644
--- a/freqtrade/rpc/api_server/api_v1.py
+++ b/freqtrade/rpc/api_server/api_v1.py
@@ -31,7 +31,8 @@ logger = logging.getLogger(__name__)
 # Version increments should happen in "small" steps (1.1, 1.12, ...) unless big changes happen.
 # 1.11: forcebuy and forcesell accept ordertype
 # 1.12: add blacklist delete endpoint
-API_VERSION = 1.12
+# 1.13: forcebuy supports stake_amount
+API_VERSION = 1.13
 
 # Public API, requires no auth.
 router_public = APIRouter()
@@ -134,7 +135,9 @@ def show_config(rpc: Optional[RPC] = Depends(get_rpc_optional), config=Depends(g
 @router.post('/forcebuy', response_model=ForceBuyResponse, tags=['trading'])
 def forcebuy(payload: ForceBuyPayload, rpc: RPC = Depends(get_rpc)):
     ordertype = payload.ordertype.value if payload.ordertype else None
-    trade = rpc._rpc_forcebuy(payload.pair, payload.price, ordertype)
+    stake_amount = payload.stakeamount if payload.stakeamount else None
+
+    trade = rpc._rpc_forcebuy(payload.pair, payload.price, ordertype, stake_amount)
 
     if trade:
         return ForceBuyResponse.parse_obj(trade.to_json())
diff --git a/freqtrade/rpc/rpc.py b/freqtrade/rpc/rpc.py
index 2232496de..c78ff1079 100644
--- a/freqtrade/rpc/rpc.py
+++ b/freqtrade/rpc/rpc.py
@@ -707,8 +707,8 @@ class RPC:
             self._freqtrade.wallets.update()
             return {'result': f'Created sell order for trade {trade_id}.'}
 
-    def _rpc_forcebuy(self, pair: str, price: Optional[float],
-                      order_type: Optional[str] = None) -> Optional[Trade]:
+    def _rpc_forcebuy(self, pair: str, price: Optional[float], order_type: Optional[str] = None,
+                      stake_amount: Optional[float] = None) -> Optional[Trade]:
         """
         Handler for forcebuy <asset> <price>
         Buys a pair trade at the given or current price
@@ -733,14 +733,15 @@ class RPC:
             if not self._freqtrade.strategy.position_adjustment_enable:
                 raise RPCException(f'position for {pair} already open - id: {trade.id}')
 
-        # gen stake amount
-        stakeamount = self._freqtrade.wallets.get_trade_stake_amount(pair)
+        if not stake_amount:
+            # gen stake amount
+            stake_amount = self._freqtrade.wallets.get_trade_stake_amount(pair)
 
         # execute buy
         if not order_type:
             order_type = self._freqtrade.strategy.order_types.get(
                 'forcebuy', self._freqtrade.strategy.order_types['buy'])
-        if self._freqtrade.execute_entry(pair, stakeamount, price,
+        if self._freqtrade.execute_entry(pair, stake_amount, price,
                                          ordertype=order_type, trade=trade):
             Trade.commit()
             trade = Trade.get_trades([Trade.is_open.is_(True), Trade.pair == pair]).first()
diff --git a/tests/rpc/test_rpc.py b/tests/rpc/test_rpc.py
index fd43df019..27c509c94 100644
--- a/tests/rpc/test_rpc.py
+++ b/tests/rpc/test_rpc.py
@@ -1108,9 +1108,14 @@ def test_rpcforcebuy(mocker, default_conf, ticker, fee, limit_buy_order_open) ->
     with pytest.raises(RPCException,
                        match=r'Wrong pair selected. Only pairs with stake-currency.*'):
         rpc._rpc_forcebuy('LTC/ETH', 0.0001)
-    pair = 'XRP/BTC'
+
+    # Test with defined stake_amount
+    pair = 'LTC/BTC'
+    trade = rpc._rpc_forcebuy(pair, 0.0001, order_type='limit', stake_amount=0.05)
+    assert trade.stake_amount == 0.05
 
     # Test not buying
+    pair = 'XRP/BTC'
     freqtradebot = get_patched_freqtradebot(mocker, default_conf)
     freqtradebot.config['stake_amount'] = 0
     patch_get_signal(freqtradebot)