diff --git a/src/parser/grammar.lalrpop b/src/parser/grammar.lalrpop
index 2e48d557be..2f578b7ada 100644
--- a/src/parser/grammar.lalrpop
+++ b/src/parser/grammar.lalrpop
@@ -518,8 +518,9 @@ StrChunks: RichTerm = {
             }).collect();
 
             RichTerm::from(build_record([
+                (FieldPathElem::Ident("tag".into()), RichTerm::from(Term::Enum("SymbolicString".into()))),
                 (FieldPathElem::Ident("prefix".into()), RichTerm::from(Term::Str(prefix.to_owned()))),
-                (FieldPathElem::Ident("chunks".into()), RichTerm::from(Term::Array(terms, Default::default())))
+                (FieldPathElem::Ident("fragments".into()), RichTerm::from(Term::Array(terms, Default::default())))
             ], Default::default()))
         } else {
             let mut chunks = chunks;
@@ -914,7 +915,7 @@ extern {
         "\"%" => Token::MultiStr(MultiStringToken::End),
         "m%\"" => Token::Normal(NormalToken::MultiStringStart(<usize>)),
         "symbolic string start" => Token::Normal(NormalToken::SymbolicStringStart(
-          SymbolicStringStart{prefix: <&'input str>, percent_count: <usize>})),
+          SymbolicStringStart{prefix: <&'input str>, length: <usize>})),
 
         "Num" => Token::Normal(NormalToken::Num),
         "Dyn" => Token::Normal(NormalToken::Dyn),
diff --git a/src/parser/lexer.rs b/src/parser/lexer.rs
index e962a0cf8c..f41dd69f6b 100644
--- a/src/parser/lexer.rs
+++ b/src/parser/lexer.rs
@@ -42,7 +42,7 @@ fn symbolic_string_prefix_and_length<'input>(
         .expect("The logos regexp ensures this succeeds");
     SymbolicStringStart {
         prefix,
-        percent_count: postfix.len(),
+        length: postfix.len(),
     }
 }
 
@@ -342,7 +342,7 @@ pub const KEYWORDS: &[&str] = &[
 #[derive(Debug, Clone, PartialEq)]
 pub struct SymbolicStringStart<'input> {
     pub prefix: &'input str,
-    pub percent_count: usize,
+    pub length: usize,
 }
 
 /// The tokens in string mode.
@@ -630,8 +630,7 @@ impl<'input> Iterator for Lexer<'input> {
             Some(Normal(
                 NormalToken::MultiStringStart(delim_size)
                 | NormalToken::SymbolicStringStart(SymbolicStringStart {
-                    percent_count: delim_size,
-                    ..
+                    length: delim_size, ..
                 }),
             )) => {
                 // for interpolation & closing delimeters we only care about
diff --git a/src/parser/tests.rs b/src/parser/tests.rs
index 194b6e52bc..9b3d6e378f 100644
--- a/src/parser/tests.rs
+++ b/src/parser/tests.rs
@@ -1,6 +1,6 @@
 use std::rc::Rc;
 
-use super::lexer::{Lexer, MultiStringToken, NormalToken, StringToken, Token};
+use super::lexer::{Lexer, MultiStringToken, NormalToken, StringToken, SymbolicStringStart, Token};
 use super::utils::{build_record, FieldPathElem};
 use crate::error::ParseError;
 use crate::identifier::Ident;
@@ -41,12 +41,16 @@ fn mk_single_chunk(s: &str) -> RichTerm {
 fn mk_symbolic_single_chunk(prefix: &str, s: &str) -> RichTerm {
     build_record(
         [
+            (
+                FieldPathElem::Ident("tag".into()),
+                RichTerm::from(Term::Enum("SymbolicString".into())),
+            ),
             (
                 FieldPathElem::Ident("prefix".into()),
                 RichTerm::from(Term::Str(prefix.to_owned())),
             ),
             (
-                FieldPathElem::Ident("chunks".into()),
+                FieldPathElem::Ident("fragments".into()),
                 RichTerm::from(Array(
                     Array::new(Rc::new([Str(String::from(s)).into()])),
                     Default::default(),
@@ -388,7 +392,10 @@ fn string_lexing() {
             "empty symbolic string lexes like multi-line str",
             r#"foo-s%""%"#,
             vec![
-                Token::Normal(NormalToken::SymbolicStringStart(("foo", 3))),
+                Token::Normal(NormalToken::SymbolicStringStart(SymbolicStringStart {
+                    prefix: "foo",
+                    length: 3,
+                })),
                 Token::MultiStr(MultiStringToken::End),
             ],
         ),
@@ -396,7 +403,10 @@ fn string_lexing() {
             "symbolic string with interpolation",
             r#"foo-s%"text %{ 1 } etc."%"#,
             vec![
-                Token::Normal(NormalToken::SymbolicStringStart(("foo", 3))),
+                Token::Normal(NormalToken::SymbolicStringStart(SymbolicStringStart {
+                    prefix: "foo",
+                    length: 3,
+                })),
                 Token::MultiStr(MultiStringToken::Literal("text ")),
                 Token::MultiStr(MultiStringToken::Interpolation),
                 Token::Normal(NormalToken::NumLiteral(1.0)),
@@ -409,7 +419,10 @@ fn string_lexing() {
             "empty symbolic string with tag",
             r#"tf-s%""%"#,
             vec![
-                Token::Normal(NormalToken::SymbolicStringStart(("tf", 3))),
+                Token::Normal(NormalToken::SymbolicStringStart(SymbolicStringStart {
+                    prefix: "tf",
+                    length: 3,
+                })),
                 Token::MultiStr(MultiStringToken::End),
             ],
         ),
diff --git a/tests/integration/pass/symbolic-strings.ncl b/tests/integration/pass/symbolic-strings.ncl
index daa520e903..4895789ecc 100644
--- a/tests/integration/pass/symbolic-strings.ncl
+++ b/tests/integration/pass/symbolic-strings.ncl
@@ -1,5 +1,5 @@
 let {check, ..} = import "lib/assert.ncl" in
-let sym = fun prefix_ chunks_ => { prefix = prefix_, chunks = chunks_ } in
+let sym = fun prefix_ fragments_ => { tag = `SymbolicString, prefix = prefix_, fragments = fragments_ } in
 [
   # Static symbolic string
   foo-s%"hello, world"% == sym "foo" ["hello, world"] ,