diff --git a/das/src/main/java/com/das/modules/calc/service/CalcService.java b/das/src/main/java/com/das/modules/calc/service/CalcService.java
index 0e291a3b..6872e1c4 100644
--- a/das/src/main/java/com/das/modules/calc/service/CalcService.java
+++ b/das/src/main/java/com/das/modules/calc/service/CalcService.java
@@ -134,6 +134,9 @@ public class CalcService {
 
         FunctionOffsetDate offsetDate = new FunctionOffsetDate();
         aviator.addFunction(offsetDate);
+
+        FunctionWindSpeedFactor windSpeedFactor = new FunctionWindSpeedFactor(dataService,cacheService);
+        aviator.addFunction(windSpeedFactor);
     }
 
     /**