diff --git a/spark/src/main/scala/org/apache/spark/sql/delta/actions/actions.scala b/spark/src/main/scala/org/apache/spark/sql/delta/actions/actions.scala
index ac341031579..e8eec00405e 100644
--- a/spark/src/main/scala/org/apache/spark/sql/delta/actions/actions.scala
+++ b/spark/src/main/scala/org/apache/spark/sql/delta/actions/actions.scala
@@ -1077,6 +1077,7 @@ case class CommitInfo(
     // infer the commit version from the file name and fill in this field then.
     @JsonDeserialize(contentAs = classOf[java.lang.Long])
     version: Option[Long],
+    @JsonDeserialize(contentAs = classOf[java.lang.Long])
     inCommitTimestamp: Option[Long],
     timestamp: Timestamp,
     userId: Option[String],
diff --git a/spark/src/test/scala/org/apache/spark/sql/delta/ActionSerializerSuite.scala b/spark/src/test/scala/org/apache/spark/sql/delta/ActionSerializerSuite.scala
index 605eb8ee77f..3fe73dbaea9 100644
--- a/spark/src/test/scala/org/apache/spark/sql/delta/ActionSerializerSuite.scala
+++ b/spark/src/test/scala/org/apache/spark/sql/delta/ActionSerializerSuite.scala
@@ -185,6 +185,25 @@ class ActionSerializerSuite extends QueryTest with SharedSparkSession with Delta
     assert(Action.fromJson(json1) === expectedCommitInfo)
   }
 
+  test("deserialization of CommitInfo with a very small ICT") {
+    val json1 =
+      """{"commitInfo":{"inCommitTimestamp":123,"timestamp":123,"operation":"CONVERT",""" +
+        """"operationParameters":{},"readVersion":23,""" +
+        """"isolationLevel":"SnapshotIsolation","isBlindAppend":true,""" +
+        """"operationMetrics":{"m1":"v1","m2":"v2"},"userMetadata":"123"}}""".stripMargin
+    assert(Action.fromJson(json1).asInstanceOf[CommitInfo].inCommitTimestamp.get == 123L)
+  }
+
+  test("deserialization of CommitInfo with missing ICT") {
+    val json1 =
+      """{"commitInfo":{"timestamp":123,"operation":"CONVERT",""" +
+        """"operationParameters":{},"readVersion":23,""" +
+        """"isolationLevel":"SnapshotIsolation","isBlindAppend":true,""" +
+        """"operationMetrics":{"m1":"v1","m2":"v2"},"userMetadata":"123"}}""".stripMargin
+    val ictOpt: Option[Long] = Action.fromJson(json1).asInstanceOf[CommitInfo].inCommitTimestamp
+    assert(ictOpt.isEmpty)
+  }
+
   testActionSerDe(
     "Protocol - json serialization/deserialization",
     Protocol(minReaderVersion = 1, minWriterVersion = 2),