diff --git a/src/cli/update_interactive_command.zig b/src/cli/update_interactive_command.zig
index 5435184c4e..4890fc7648 100644
--- a/src/cli/update_interactive_command.zig
+++ b/src/cli/update_interactive_command.zig
@@ -1687,8 +1687,9 @@ pub const UpdateInteractiveCommand = struct {
                             }
                         }
                     } else {
-                        // Individual selection mode, just toggle current cursor package
+                        // Individual selection mode, just toggle current cursor package and select it
                         state.packages[state.cursor].use_latest = !state.packages[state.cursor].use_latest;
+                        state.selected[state.cursor] = true;
                     }
                 },
                 'j' => {
diff --git a/test/cli/update_interactive_install.test.ts b/test/cli/update_interactive_install.test.ts
index 919cf2e6f2..82c2f43631 100644
--- a/test/cli/update_interactive_install.test.ts
+++ b/test/cli/update_interactive_install.test.ts
@@ -146,8 +146,8 @@ describe.concurrent("bun update --interactive actually installs packages", () =>
     });
 
     try {
-      updateProc.stdin.write("l"); // toggle latest
-      updateProc.stdin.write(" "); // select
+      // 'l' toggles to latest AND selects the package (no separate space needed)
+      updateProc.stdin.write("l"); // toggle latest (also selects)
       updateProc.stdin.write("\r"); // confirm
       updateProc.stdin.end();
 
diff --git a/test/regression/issue/24131.test.ts b/test/regression/issue/24131.test.ts
new file mode 100644
index 0000000000..987c3989d7
--- /dev/null
+++ b/test/regression/issue/24131.test.ts
@@ -0,0 +1,70 @@
+import { describe, expect, it } from "bun:test";
+import { readFileSync } from "fs";
+import { bunEnv, bunExe, tempDir } from "harness";
+import { join } from "path";
+
+describe("issue #24131 - 'l' key should select package in interactive update", () => {
+  it("should select package when pressing 'l' to toggle use_latest", async () => {
+    using dir = tempDir("issue-24131", {
+      "package.json": JSON.stringify({
+        name: "test-project",
+        version: "1.0.0",
+        dependencies: {
+          // Use a very old version that definitely has updates available
+          "is-even": "0.1.0",
+        },
+      }),
+    });
+
+    // First, run bun install to create initial node_modules and lockfile
+    await using installProc = Bun.spawn({
+      cmd: [bunExe(), "install"],
+      cwd: String(dir),
+      env: bunEnv,
+      stdout: "pipe",
+      stderr: "pipe",
+    });
+
+    const installExitCode = await installProc.exited;
+    expect(installExitCode).toBe(0);
+
+    // Read the initial package.json to verify starting state
+    const initialPackageJson = JSON.parse(readFileSync(join(String(dir), "package.json"), "utf8"));
+    expect(initialPackageJson.dependencies["is-even"]).toBe("0.1.0");
+
+    // Now run update --interactive
+    // Press 'l' to toggle use_latest (which should also select the package)
+    // Then press 'y' or Enter to confirm
+    await using updateProc = Bun.spawn({
+      cmd: [bunExe(), "update", "--interactive"],
+      cwd: String(dir),
+      env: bunEnv,
+      stdin: "pipe",
+      stdout: "pipe",
+      stderr: "pipe",
+    });
+
+    // 'l' toggles use_latest and should also select the package (the fix)
+    // '\r' (Enter) confirms the selection
+    updateProc.stdin.write("l\r");
+    updateProc.stdin.end();
+
+    const [stdout, stderr, exitCode] = await Promise.all([
+      updateProc.stdout.text(),
+      updateProc.stderr.text(),
+      updateProc.exited,
+    ]);
+
+    // Check that package.json was updated - this proves 'l' selected the package
+    // Before the fix, 'l' would toggle use_latest but not select the package,
+    // so Enter would result in no packages being updated
+    const updatedPackageJson = JSON.parse(readFileSync(join(String(dir), "package.json"), "utf8"));
+    const updatedVersion = updatedPackageJson.dependencies["is-even"];
+
+    // The version should have changed from "0.1.0"
+    // This assertion failing means 'l' did not select the package
+    expect(updatedVersion).not.toBe("0.1.0");
+
+    expect(exitCode).toBe(0);
+  });
+});