diff --git a/litedram/frontend/axi.py b/litedram/frontend/axi.py
index cb590cf..5da64e5 100644
--- a/litedram/frontend/axi.py
+++ b/litedram/frontend/axi.py
@@ -31,6 +31,7 @@ class LiteDRAMAXIPort(AXIInterface):
 
 class LiteDRAMAXI2NativeW(Module):
     def __init__(self, axi, port, buffer_depth, base_address):
+        assert axi.address_width >= log2_int(base_address)
         self.cmd_request = Signal()
         self.cmd_grant = Signal()
 
@@ -97,6 +98,7 @@ class LiteDRAMAXI2NativeW(Module):
 
 class LiteDRAMAXI2NativeR(Module):
     def __init__(self, axi, port, buffer_depth, base_address):
+        assert axi.address_width >= log2_int(base_address)
         self.cmd_request = Signal()
         self.cmd_grant = Signal()