diff --git a/R/InsuranceContract.R b/R/InsuranceContract.R
index 92e43a00f3a4a8188494fac41ded49c116b3cea9..4a938bd6b5473ea2008ae010e3b266d05ffd6494 100644
--- a/R/InsuranceContract.R
+++ b/R/InsuranceContract.R
@@ -479,7 +479,7 @@ InsuranceContract = R6Class(
             # Override with arguments explicitly given
             arguments = list(...)
             params[names(arguments)] = arguments[names(arguments)]
-            params$comment = sprintf("Dynamic increase at time %d to sum %d", t, NewSumInsured)
+            params$comment = sprintf("Dynamic increase at time %d to sum %02f", t, NewSumInsured)
             do.call(self$addBlock, params)
         },