diff --git a/core/src/main/java/tech/tablesaw/api/InstantColumn.java b/core/src/main/java/tech/tablesaw/api/InstantColumn.java
index 971fd4953..2ed4e9c7e 100644
--- a/core/src/main/java/tech/tablesaw/api/InstantColumn.java
+++ b/core/src/main/java/tech/tablesaw/api/InstantColumn.java
@@ -273,7 +273,7 @@ public InstantColumn appendObj(Object obj) {
       return append(timestamp.toInstant());
     }
     throw new IllegalArgumentException(
-        "Cannot append " + obj.getClass().getName() + " to DateTimeColumn");
+        "Cannot append " + obj.getClass().getName() + " to InstantColumn");
   }
 
   /** {@inheritDoc} */