diff --git a/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/ProtoResultSetMetadata.java b/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/ProtoResultSetMetadata.java
index 36bbdf5008..45542d96e6 100644
--- a/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/ProtoResultSetMetadata.java
+++ b/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/ProtoResultSetMetadata.java
@@ -22,6 +22,7 @@
 import com.google.cloud.bigtable.data.v2.models.sql.ColumnMetadata;
 import com.google.cloud.bigtable.data.v2.models.sql.ResultSetMetadata;
 import com.google.cloud.bigtable.data.v2.models.sql.SqlType;
+import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import java.util.List;
@@ -94,4 +95,9 @@ public boolean equals(@Nullable Object other) {
     }
     return false;
   }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(columns);
+  }
 }
diff --git a/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/models/SampleRowKeysRequest.java b/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/models/SampleRowKeysRequest.java
index d2a9dcb6a7..78a444019c 100644
--- a/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/models/SampleRowKeysRequest.java
+++ b/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/models/SampleRowKeysRequest.java
@@ -85,4 +85,9 @@ public boolean equals(Object o) {
     SampleRowKeysRequest sampleRowKeysRequest = (SampleRowKeysRequest) o;
     return Objects.equal(targetId, sampleRowKeysRequest.targetId);
   }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(targetId);
+  }
 }