diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 87765f68541..e57b03c941f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -67,7 +67,7 @@ jobs:
           rustup default stable
           rustup component add rustfmt
       - name: Setup parquet files
-        run: | 
+        run: |
           apt update && apt install python3-pip python3-venv -y -q
           python3 -m venv venv
           venv/bin/pip install pip --upgrade
@@ -158,13 +158,42 @@ jobs:
       - name: Run
         env:
           RUST_BACKTRACE: full
-          RUST_LOG: 'trace'
+          RUST_LOG: "trace"
         # --skip io: miri can't handle opening of files, so we skip those
         run: |
           cargo miri setup
           cargo clean
           cargo miri test --features full -- --skip io::parquet --skip io::ipc
 
+  miri-checks-custom-allocator:
+    name: MIRI with custom allocator
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-miri-${{ hashFiles('**/Cargo.lock') }}
+      - name: Setup toolchain
+        run: |
+          rustup toolchain install nightly-2021-07-03
+          rustup default nightly-2021-07-03
+          rustup component add rustfmt miri
+      - name: Run
+        env:
+          RUST_BACKTRACE: full
+          RUST_LOG: "trace"
+        # --skip io: miri can't handle opening of files, so we skip those
+        run: |
+          cargo miri setup
+          cargo clean
+          cargo miri test --features full,cache_aligned -- --skip io::parquet --skip io::ipc
+
   coverage:
     name: Coverage
     runs-on: ubuntu-latest
@@ -185,7 +214,7 @@ jobs:
           # this key is not equal because coverage uses different compilation flags.
           key: ${{ runner.os }}-amd64-target-coverage-cache-stable-
       - name: Setup parquet files
-        run: | 
+        run: |
           apt update && apt install python3-pip python3-venv -y -q
           python3 -m venv venv
           venv/bin/pip install pip --upgrade
@@ -199,6 +228,7 @@ jobs:
           # 2020-11-15: There is a cargo-tarpaulin regression in 0.17.0
           # see https://github.com/xd009642/tarpaulin/issues/618
           cargo install --version 0.16.0 cargo-tarpaulin
+          cargo tarpaulin --features cache_aligned --out Xml
           cargo tarpaulin --features full --out Xml
       - name: Report coverage
         continue-on-error: true
diff --git a/Cargo.toml b/Cargo.toml
index 6d5684dda3d..001bcc67910 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -99,6 +99,7 @@ full = [
     "compute",
     # parses timezones used in timestamp conversions
     "chrono-tz",
+    "cache_aligned"
 ]
 merge_sort = ["itertools"]
 io_csv = ["io_csv_read", "io_csv_write"]
diff --git a/src/vec.rs b/src/vec.rs
index 8ce7e7c785a..859769b34c0 100644
--- a/src/vec.rs
+++ b/src/vec.rs
@@ -45,6 +45,12 @@ pub struct AlignedVec<T: NativeType> {
     capacity: usize,
 }
 
+impl<T: NativeType> Drop for AlignedVec<T> {
+    fn drop(&mut self) {
+        unsafe { alloc::free_aligned(self.ptr, self.capacity) }
+    }
+}
+
 impl<T: NativeType> AlignedVec<T> {
     #[inline]
     pub fn new() -> Self {