diff --git a/src/formatting.rs b/src/formatting.rs
index 9a9f07e..26617c3 100644
--- a/src/formatting.rs
+++ b/src/formatting.rs
@@ -563,14 +563,15 @@ impl<'a> Formatter<'a> {
 
     /// Format a range expression
     fn format_range(&mut self, range: &nu_protocol::ast::Range) {
+        let op = range.operator.to_string();
         if let Some(from) = &range.from {
             self.format_expression(from);
         }
-        self.write("..");
+        self.write(&op);
         if let Some(next) = &range.next {
             self.format_expression(next);
             // For step ranges (start..step..end), write the operator again before end
-            self.write("..");
+            self.write(&op);
         }
         if let Some(to) = &range.to {
             self.format_expression(to);
diff --git a/tests/fixtures/expected/range.nu b/tests/fixtures/expected/range.nu
index 768df1b..60e61c0 100644
--- a/tests/fixtures/expected/range.nu
+++ b/tests/fixtures/expected/range.nu
@@ -4,3 +4,5 @@
 1..2..10
 0..
 ..10
+0..<300
+1..<10
diff --git a/tests/fixtures/input/range.nu b/tests/fixtures/input/range.nu
index 8ed1a15..fb17c33 100644
--- a/tests/fixtures/input/range.nu
+++ b/tests/fixtures/input/range.nu
@@ -4,3 +4,5 @@
    1..2..10
   0..
    ..10
+  0..<300
+   1..<10