diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d9e5915..7ad559b 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -16,7 +16,7 @@ jobs:
           - 'min'
           - 'lts'
           - '1'
-          - 'pre'
+          - '1.12-nightly'
         os:
           - ubuntu-latest
           - windows-latest
@@ -29,7 +29,7 @@ jobs:
           - os: macos-13
             arch: x64
             version: '1'
-            
+
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/src/bfloat16.jl b/src/bfloat16.jl
index ef95afe..403d38a 100644
--- a/src/bfloat16.jl
+++ b/src/bfloat16.jl
@@ -37,7 +37,7 @@ else
     false
 end
 const llvm_arithmetic = if llvm_storage
-    using Core: BFloat16
+    import Core: BFloat16
     if Sys.ARCH in [:x86_64, :i686] && Base.libllvm_version >= v"15"
         true
     elseif Sys.ARCH == :aarch64 && Base.libllvm_version >= v"19"