diff --git a/Cargo.lock b/Cargo.lock
index 5fdc77b..c659fb0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -450,7 +450,7 @@ dependencies = [
 
 [[package]]
 name = "nixos-exporter"
-version = "0.4.0"
+version = "0.5.0"
 dependencies = [
  "axum",
  "reqwest",
diff --git a/Cargo.toml b/Cargo.toml
index f8fa6d8..9299d4e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nixos-exporter"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 
 [dependencies]
diff --git a/flake.nix b/flake.nix
index a8eab61..19a0fcf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,7 +10,7 @@
     in {
       nixos-exporter = pkgs.rustPlatform.buildRustPackage rec {
         pname = "nixos-exporter";
-        version = "0.4.0";
+        version = "0.5.0";
 
         src = ./.;
 
diff --git a/src/main.rs b/src/main.rs
index e1cae60..c5cab96 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -174,14 +174,14 @@ async fn main() {
 
 async fn metrics() -> Result<(StatusCode, impl IntoResponse), (StatusCode, impl IntoResponse)> {
     let nix_store_paths = HashMap::from([
-    ("current_system", NixStorePath::from_str_symlink("/run/current-system")
-        .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
-    ("current_system_kernel", NixStorePath::from_str_symlink("/run/current-system/kernel")
-        .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
-    ("booted_system", NixStorePath::from_str_symlink("/run/booted-system")
-        .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
-    ("booted_system_kernel", NixStorePath::from_str_symlink("/run/booted-system/kernel")
-        .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
+        ("current_system", NixStorePath::from_str_symlink("/run/current-system")
+            .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
+        ("current_system_kernel", NixStorePath::from_str_symlink("/run/current-system/kernel")
+            .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
+        ("booted_system", NixStorePath::from_str_symlink("/run/booted-system")
+            .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
+        ("booted_system_kernel", NixStorePath::from_str_symlink("/run/booted-system/kernel")
+            .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?),
     ]);
 
     let mut out = String::new();
@@ -190,6 +190,12 @@ async fn metrics() -> Result<(StatusCode, impl IntoResponse), (StatusCode, impl
             .map_err(|err| (StatusCode::INTERNAL_SERVER_ERROR, err))?.as_str());
     }
 
+    out.push_str(format!("nixos_current_system_kernel_is_booted_system_kernel{{}} {}", (
+            nix_store_paths.get("current_system_kernel").ok_or_else(|| (StatusCode::INTERNAL_SERVER_ERROR, String::from("")))?.hash
+            == nix_store_paths.get("booted_system_kernel").ok_or_else(|| (StatusCode::INTERNAL_SERVER_ERROR, String::from("")))?.hash
+        ) as i32).as_str()
+    );
+
     return Ok((
         StatusCode::OK,
         out,