diff --git a/pyasic/miners/backends/espminer.py b/pyasic/miners/backends/espminer.py
index d3826a5f..0b54b9f7 100644
--- a/pyasic/miners/backends/espminer.py
+++ b/pyasic/miners/backends/espminer.py
@@ -115,11 +115,18 @@ class ESPMiner(BaseMiner):
 
         if web_system_info is not None:
             try:
-                expected_hashrate = (
-                    web_system_info.get("smallCoreCount")
-                    * web_system_info.get("asicCount")
-                    * web_system_info.get("frequency")
-                )
+                small_core_count = web_system_info.get("smallCoreCount")
+                asic_count = web_system_info.get("asicCount")
+                frequency = web_system_info.get("frequency")
+
+                if asic_count is None:
+                    try:
+                        asic_info = await self.web.asic_info()
+                        asic_count = asic_info.get("asicCount")
+                    except APIError:
+                        pass
+
+                expected_hashrate = small_core_count * asic_count * frequency
 
                 return self.algo.hashrate(
                     rate=float(expected_hashrate), unit=self.algo.unit.MH
diff --git a/pyasic/web/espminer.py b/pyasic/web/espminer.py
index aa33ffb9..8ce1b5de 100644
--- a/pyasic/web/espminer.py
+++ b/pyasic/web/espminer.py
@@ -96,3 +96,6 @@ class ESPMinerWebAPI(BaseWebAPI):
 
     async def update_settings(self, **config):
         return await self.send_command("system", patch=True, **config)
+
+    async def asic_info(self):
+        return await self.send_command("system/asic")