--- a/src/actuarialmath/constantforce.py
+++ b/src/actuarialmath/constantforce.py
@@ -133,7 +133,7 @@
         """
         if moment > 0 and not discrete:
             delta = moment * self.interest.delta   # multiply force of interest
-            return self.mu_ / (self.mu_ + delta) if self.mu_ > 0 else 0.
+            return b**moment * self.mu_ / (self.mu_ + delta) if self.mu_ > 0 else 0.
         return super().whole_life_insurance(x, s=s, moment=moment, b=b,
                                             discrete=discrete)