diff --git a/crates/uv-workspace/src/pyproject_mut.rs b/crates/uv-workspace/src/pyproject_mut.rs
index 696aa442fadd..f24c960cf15e 100644
--- a/crates/uv-workspace/src/pyproject_mut.rs
+++ b/crates/uv-workspace/src/pyproject_mut.rs
@@ -893,16 +893,14 @@ fn reformat_array_multiline(deps: &mut Array) {
             let decor_prefix = decor
                 .prefix()
                 .and_then(|s| s.as_str())
-                .map(|s| s.split('#').next().unwrap_or(""))
-                .unwrap_or_default()
-                .trim_start_matches(['\r', '\n'].as_ref())
-                .to_string();
+                .and_then(|s| s.lines().last())
+                .unwrap_or_default();
 
             // If there is no indentation, use four-space.
             indentation_prefix = Some(if decor_prefix.is_empty() {
                 "    ".to_string()
             } else {
-                decor_prefix
+                decor_prefix.to_string()
             });
         }
 
diff --git a/crates/uv/tests/it/edit.rs b/crates/uv/tests/it/edit.rs
index 94607c90477c..fb79fc9c0251 100644
--- a/crates/uv/tests/it/edit.rs
+++ b/crates/uv/tests/it/edit.rs
@@ -6389,10 +6389,10 @@ fn add_preserves_open_bracket_comment() -> Result<()> {
         version = "0.1.0"
         requires-python = ">=3.12"
         dependencies = [ # comment 0
-         # comment 1
-         "anyio==3.7.0", # comment 2
-         # comment 3
-         "requests==2.31.0",
+            # comment 1
+            "anyio==3.7.0", # comment 2
+            # comment 3
+            "requests==2.31.0",
         ]
 
         [build-system]