diff --git a/interface.c b/interface.c
index 11c08415..6cf6d884 100644
--- a/interface.c
+++ b/interface.c
@@ -155,7 +155,7 @@ int GetDrivablePosition(void *pObject, SConnection *pCon, float *fPos)
     return MotorGetSoftPosition(pMot,pCon,fPos);
   }
   value = pDriv->GetValue(pObject,pCon);
-  if(value < 9999.99)
+  if(value < -9999.0)
   {
     return 0;
   }