diff --git a/tracecallback_noimpl.go b/tracecallback_noimpl.go
index 09b55d0..5db43a5 100644
--- a/tracecallback_noimpl.go
+++ b/tracecallback_noimpl.go
@@ -13,6 +13,40 @@ const (
 	TraceClose   = uint32(0x08)
 )
 
+type TraceInfo struct {
+	// Pack together the shorter fields, to keep the struct smaller.
+	// On a 64-bit machine there would be padding
+	// between EventCode and ConnHandle; having AutoCommit here is "free":
+	EventCode  uint32
+	AutoCommit bool
+	ConnHandle uintptr
+
+	// Usually filled, unless EventCode = TraceClose = SQLITE_TRACE_CLOSE:
+	// identifier for a prepared statement:
+	StmtHandle uintptr
+
+	// Two strings filled when EventCode = TraceStmt = SQLITE_TRACE_STMT:
+	// (1) either the unexpanded SQL text of the prepared statement, or
+	//     an SQL comment that indicates the invocation of a trigger;
+	// (2) expanded SQL, if requested and if (1) is not an SQL comment.
+	StmtOrTrigger string
+	ExpandedSQL   string // only if requested (TraceConfig.WantExpandedSQL = true)
+
+	// filled when EventCode = TraceProfile = SQLITE_TRACE_PROFILE:
+	// estimated number of nanoseconds that the prepared statement took to run:
+	RunTimeNanosec int64
+
+	DBError Error
+}
+
+type TraceUserCallback func(TraceInfo) int
+
+type TraceConfig struct {
+	Callback        TraceUserCallback
+	EventMask       uint
+	WantExpandedSQL bool
+}
+
 // RegisterAggregator register the aggregator.
 func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool) error {
 	return errors.New("This feature is not implemented")