diff --git a/crates/color/src/lut.rs b/crates/color/src/lut.rs
index 67590eb12..73879a5b0 100644
--- a/crates/color/src/lut.rs
+++ b/crates/color/src/lut.rs
@@ -308,7 +308,11 @@ impl Lut {
         if let Some(sh) = &self.shaper {
             let _ = writeln!(s, "LUT_1D_SIZE {}", sh.size());
             if both {
-                if sh.domain_min != [0.0; 3] || sh.domain_max != [1.0; 3] {
+                let uniform = sh.domain_min.iter().all(|v| *v == sh.domain_min[0]) && sh.domain_max.iter().all(|v| *v == sh.domain_max[0]);
+                if !uniform {
+                    // with both tables, DOMAIN_MIN/DOMAIN_MAX belong to the shaper
+                    write_domain(&mut s, sh.domain_min, sh.domain_max);
+                } else if sh.domain_min != [0.0; 3] || sh.domain_max != [1.0; 3] {
                     let _ = writeln!(s, "LUT_1D_INPUT_RANGE {} {}", sh.domain_min[0], sh.domain_max[0]);
                 }
             } else {
@@ -650,4 +654,16 @@ mod tests {
         let mesh257 = (0..257).map(|i| i.to_string()).collect::<Vec<_>>().join(" ") + "\n";
         assert!(Lut::parse_3dl(&mesh257).is_err());
     }
+
+    #[test]
+    fn cube_shaper_per_channel_domain_round_trips() {
+        let mut text = String::from("LUT_1D_SIZE 2\nLUT_3D_SIZE 2\nDOMAIN_MAX 1 2 3\n");
+        for _ in 0..10 {
+            text.push_str("0 0 0\n");
+        }
+        let a = Lut::parse_cube(&text).unwrap();
+        assert_eq!(a.shaper.as_ref().unwrap().domain_max, [1.0, 2.0, 3.0]);
+        let b = Lut::parse_cube(&a.to_cube()).unwrap();
+        assert_eq!(b.shaper.unwrap().domain_max, [1.0, 2.0, 3.0]);
+    }
 }