diff --git a/release-packaging/Classes/FluidDataSet.sc b/release-packaging/Classes/FluidDataSet.sc
index bba6894..b46642c 100644
--- a/release-packaging/Classes/FluidDataSet.sc
+++ b/release-packaging/Classes/FluidDataSet.sc
@@ -14,7 +14,7 @@ FluidDataSet : FluidManipulationClient {
     }
 
     asString {
-        ^id
+        ^id.asString;
     }
 
     addPoint{|label, buffer, action|
diff --git a/release-packaging/Classes/FluidLabelSet.sc b/release-packaging/Classes/FluidLabelSet.sc
index 1603c6f..eb19f6d 100644
--- a/release-packaging/Classes/FluidLabelSet.sc
+++ b/release-packaging/Classes/FluidLabelSet.sc
@@ -13,7 +13,7 @@ FluidLabelSet : FluidManipulationClient {
     }
 
     asString {
-        ^id;
+        ^id.asString;
     }
 
     addLabel{|id, label, action|