diff --git a/pymodbus/simulator/simruntime.py b/pymodbus/simulator/simruntime.py
index 5d0e5a8a1..817df356d 100644
--- a/pymodbus/simulator/simruntime.py
+++ b/pymodbus/simulator/simruntime.py
@@ -72,7 +72,7 @@ async def get_reg_block(self, block_id: str, func_code: int, address: int, count
         """Handle holding registers and input registers."""
         start_address, register_count, registers, _ = self.block[block_id]
         offset = address - start_address
-        if register_count <= offset < 0 or offset + count > register_count:
+        if offset < 0 or offset + count > register_count:
             return ExcCodes.ILLEGAL_ADDRESS
         if (result := await self.__check_block(func_code, block_id, address, count, offset, values)):
             return result
diff --git a/test/simulator/test_simruntime.py b/test/simulator/test_simruntime.py
index 29b9b905f..4fbcc41a8 100644
--- a/test/simulator/test_simruntime.py
+++ b/test/simulator/test_simruntime.py
@@ -135,6 +135,14 @@ async def test_simruntime_getValues(self):
         rt = SimRuntime(sd)
         result = await rt.async_getValues(0x03, 10, 1)
         assert result == [15]
+        result = await rt.async_getValues(0x03, 8, 1)
+        assert isinstance(result, ExcCodes)
+        result = await rt.async_getValues(0x03, 9, 1)
+        assert isinstance(result, ExcCodes)
+        result = await rt.async_getValues(0x03, 11, 1)
+        assert isinstance(result, ExcCodes)
+        result = await rt.async_getValues(0x03, 12, 1)
+        assert isinstance(result, ExcCodes)
         result = await rt.async_getValues(0x03, 15, 1)
         assert isinstance(result, ExcCodes)