diff --git a/parser/lexer.go b/parser/lexer.go
index 2db36e9..5ee901e 100644
--- a/parser/lexer.go
+++ b/parser/lexer.go
@@ -20,8 +20,7 @@ func (p *Parser) lexStart() (lexer.StateFn, error) {
 		switch {
 		case err != nil:
 			// read error
-			log.Printf("%s: %s: %s", p.pos, "error", err)
-			return nil, err
+			return p.emitError("", err)
 		case IsNewLine(r):
 			// new line
 			p.lexNewLine(r)
diff --git a/parser/lexer_error.go b/parser/lexer_error.go
new file mode 100644
index 0000000..9eaa98b
--- /dev/null
+++ b/parser/lexer_error.go
@@ -0,0 +1,15 @@
+package parser
+
+import "asciigoat.org/core/lexer"
+
+func (p *Parser) emitError(content string, err error) (lexer.StateFn, error) {
+	err2 := p.OnError(p.pos, content, err)
+	switch {
+	case err2 != nil:
+		// return wrapped error
+		return nil, err2
+	default:
+		// return original error
+		return nil, err
+	}
+}