diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 87b8e57..6e0c2a9 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -15,7 +15,7 @@ jobs:
             matrix:
                 compiler:
                     - { pkg: g++, exe: g++, version: 14 }
-#                    - { pkg: clang, exe: clang++, version: 18 }
+                    - { pkg: clang, exe: clang++, version: 18 }
         runs-on: ubuntu-24.04
         steps:
             - uses: actions/checkout@v3
diff --git a/src/Scanner.cpp b/src/Scanner.cpp
index ed205e3..e80b1fb 100644
--- a/src/Scanner.cpp
+++ b/src/Scanner.cpp
@@ -100,7 +100,7 @@ namespace hat {
 
     consteval auto count_matches() {
         constexpr std::array a{std::byte{1}, std::byte{2}, std::byte{3}, std::byte{4}, std::byte{1}};
-        constexpr auto s = hat::compile_signature<"01">();
+        constexpr hat::fixed_signature s{std::byte{1}};
 
         std::vector<const_scan_result> results{};
         hat::find_all_pattern(a.cbegin(), a.cend(), std::back_inserter(results), s);
@@ -110,7 +110,7 @@ namespace hat {
 
     static_assert([] {
         constexpr std::array a{std::byte{1}, std::byte{2}, std::byte{3}, std::byte{4}, std::byte{1}};
-        constexpr auto s = hat::compile_signature<"01">();
+        constexpr hat::fixed_signature s{std::byte{1}};
 
         std::vector<const_scan_result> results{};
         hat::find_all_pattern(a.cbegin(), a.cend(), std::back_inserter(results), s);
@@ -120,7 +120,7 @@ namespace hat {
 
     static_assert([] {
         constexpr std::array a{std::byte{1}, std::byte{2}, std::byte{3}, std::byte{4}, std::byte{1}};
-        constexpr auto s = hat::compile_signature<"01">();
+        constexpr hat::fixed_signature s{std::byte{1}};
 
         std::array<const_scan_result, 2> results{};
         const auto [scan_end, results_end] = hat::find_all_pattern(a.cbegin(), a.cend(), results.begin(), results.end(), s);