diff --git a/crates/compiler/builtins/roc/Dict.roc b/crates/compiler/builtins/roc/Dict.roc
index dddf993397..1f82705a4e 100644
--- a/crates/compiler/builtins/roc/Dict.roc
+++ b/crates/compiler/builtins/roc/Dict.roc
@@ -851,7 +851,7 @@ LowLevelHasher := { originalSeed : U64, state : U64 } has [
 # TODO hide behind an InternalList.roc module
 listGetUnsafe : List a, Nat -> a
 
-createLowLevelHasher : { seed ?U64 } -> LowLevelHasher
+createLowLevelHasher : { seed ? U64 } -> LowLevelHasher
 createLowLevelHasher = \{ seed ? 0x526F_6352_616E_643F } ->
     @LowLevelHasher { originalSeed: seed, state: seed }
 
diff --git a/crates/compiler/fmt/src/annotation.rs b/crates/compiler/fmt/src/annotation.rs
index 6ae31b9487..1091b81458 100644
--- a/crates/compiler/fmt/src/annotation.rs
+++ b/crates/compiler/fmt/src/annotation.rs
@@ -509,6 +509,7 @@ fn format_assigned_field_help<'a, 'buf, T>(
 
             buf.spaces(separator_spaces);
             buf.push('?');
+            buf.spaces(1);
             ann.value.format(buf, indent);
         }
         LabelOnly(name) => {
diff --git a/crates/compiler/test_syntax/tests/test_fmt.rs b/crates/compiler/test_syntax/tests/test_fmt.rs
index c00627dcc8..8dd02e681b 100644
--- a/crates/compiler/test_syntax/tests/test_fmt.rs
+++ b/crates/compiler/test_syntax/tests/test_fmt.rs
@@ -2164,6 +2164,43 @@ mod test_fmt {
         );
     }
 
+    #[test]
+    fn type_definition_add_space_around_optional_record() {
+        expr_formats_to(
+            indoc!(
+                r#"
+                f : { a ?Str }
+
+                f"#
+            ),
+            indoc!(
+                r#"
+                f : { a ? Str }
+
+                f"#
+            ),
+        );
+
+        expr_formats_to(
+            indoc!(
+                r#"
+                f : {
+                    a ?Str,
+                }
+
+                f"#
+            ),
+            indoc!(
+                r#"
+                f : {
+                    a ? Str,
+                }
+
+                f"#
+            ),
+        );
+    }
+
     #[test]
     #[ignore]
     fn final_comment_in_empty_record_type_definition() {