diff --git a/serviceerror/convert.go b/serviceerror/convert.go
index 603a176b..31926e01 100644
--- a/serviceerror/convert.go
+++ b/serviceerror/convert.go
@@ -93,6 +93,8 @@ func FromStatus(st *status.Status) error {
 		switch errDetails.(type) {
 		case *failure.MultiOperationExecutionAborted:
 			return newMultiOperationAborted(st)
+		case *errordetails.WorkflowTaskCompletionBufferLostFailure:
+			return newWorkflowTaskCompletionBufferLost(st)
 		default:
 			return newAborted(st)
 		}
diff --git a/serviceerror/convert_test.go b/serviceerror/convert_test.go
index 89c53344..5a86b70f 100644
--- a/serviceerror/convert_test.go
+++ b/serviceerror/convert_test.go
@@ -191,6 +191,22 @@ func TestMultiOperationAborted(t *testing.T) {
 	require.True(t, proto.Equal(st.Proto(), reconstructedStatus.Proto()))
 }
 
+func TestWorkflowTaskCompletionBufferLost(t *testing.T) {
+	err := serviceerror.NewWorkflowTaskCompletionBufferLost("buffer lost")
+
+	st := serviceerror.ToStatus(err)
+	require.Equal(t, codes.Aborted, st.Code())
+	require.Equal(t, err.Error(), st.Message())
+	require.Len(t, st.Details(), 1)
+
+	errFromStatus := serviceerror.FromStatus(st)
+	require.IsType(t, &serviceerror.WorkflowTaskCompletionBufferLost{}, errFromStatus)
+	require.Equal(t, err.Error(), errFromStatus.Error())
+
+	reconstructedStatus := serviceerror.ToStatus(errFromStatus)
+	require.True(t, proto.Equal(st.Proto(), reconstructedStatus.Proto()))
+}
+
 func TestFromWrapped(t *testing.T) {
 	err := &serviceerror.PermissionDenied{
 		Message: "x is not allowed",
diff --git a/serviceerror/workflow_task_completion_buffer_lost.go b/serviceerror/workflow_task_completion_buffer_lost.go
new file mode 100644
index 00000000..f2b7d309
--- /dev/null
+++ b/serviceerror/workflow_task_completion_buffer_lost.go
@@ -0,0 +1,58 @@
+package serviceerror
+
+import (
+	"fmt"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	"go.temporal.io/api/errordetails/v1"
+)
+
+type (
+	// WorkflowTaskCompletionBufferLost represents a lost buffer during processing of a
+	// paginated workflow task completion request. Clients should restart pagination by
+	// resending all pages from page 0 with the same task token.
+	WorkflowTaskCompletionBufferLost struct {
+		Message string
+		st      *status.Status
+	}
+)
+
+// NewWorkflowTaskCompletionBufferLost returns a new WorkflowTaskCompletionBufferLost error.
+func NewWorkflowTaskCompletionBufferLost(message string) error {
+	return &WorkflowTaskCompletionBufferLost{
+		Message: message,
+	}
+}
+
+// NewWorkflowTaskCompletionBufferLostf returns a new WorkflowTaskCompletionBufferLost error with a formatted message.
+func NewWorkflowTaskCompletionBufferLostf(format string, args ...any) error {
+	return &WorkflowTaskCompletionBufferLost{
+		Message: fmt.Sprintf(format, args...),
+	}
+}
+
+// Error returns string message.
+func (e *WorkflowTaskCompletionBufferLost) Error() string {
+	return e.Message
+}
+
+func (e *WorkflowTaskCompletionBufferLost) Status() *status.Status {
+	if e.st != nil {
+		return e.st
+	}
+
+	st := status.New(codes.Aborted, e.Message)
+	st, _ = st.WithDetails(
+		&errordetails.WorkflowTaskCompletionBufferLostFailure{},
+	)
+	return st
+}
+
+func newWorkflowTaskCompletionBufferLost(st *status.Status) error {
+	return &WorkflowTaskCompletionBufferLost{
+		Message: st.Message(),
+		st:      st,
+	}
+}