diff --git a/src/imports.rs b/src/imports.rs
index cfc2f3bda19..9c3a943be58 100644
--- a/src/imports.rs
+++ b/src/imports.rs
@@ -845,9 +845,18 @@ fn merge_use_trees_inner(trees: &mut Vec<UseTree>, use_tree: UseTree, merge_by:
             // tree `use_tree` should be merge.
             // In other cases `similarity` won't be used, so set it to `0` as a dummy value.
             let similarity = if merge_by == SharedPrefix::One {
+                let tree_depth = tree.path.len();
+
+                // Only merge prefixes, not leaves,
+                //   e.g. `foo::i` with `foo::i as j`.
+                let max_depth = (tree_depth == use_tree.path.len())
+                    .then_some(tree_depth - 1)
+                    .unwrap_or(usize::MAX);
+
                 tree.path
                     .iter()
                     .zip(&use_tree.path)
+                    .take(max_depth)
                     .take_while(|(a, b)| a.equal_except_alias(b))
                     .count()
             } else {
diff --git a/tests/source/5131_one.rs b/tests/source/5131_one.rs
index 61ddf13410d..91d5fb0de95 100644
--- a/tests/source/5131_one.rs
+++ b/tests/source/5131_one.rs
@@ -13,3 +13,4 @@ use bar::d::e;
 use bar::d::e as e2;
 use qux::h;
 use qux::i;
+use qux::i as j;
diff --git a/tests/target/5131_one.rs b/tests/target/5131_one.rs
index a086dae5a42..61ab9f3b8b3 100644
--- a/tests/target/5131_one.rs
+++ b/tests/target/5131_one.rs
@@ -4,9 +4,9 @@ pub use foo::{x, x as x2, y};
 use {
     bar::{
         a,
-        b::{self, f, g},
+        b::{self, f, f as f2, g},
         c,
         d::{e, e as e2},
     },
-    qux::{h, i},
+    qux::{h, i, i as j},
 };