diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b077a81..a931ec0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,6 +50,15 @@ jobs:
 
       - name: Test libmimalloc-sys crate bindings (no secure)
         run: cargo run -p libmimalloc-sys-test
+        
+      - name: Build (extended)
+        run: cargo build --features extended
+
+      - name: Test (extended)
+        run: cargo test --features extended
+
+      - name: Test libmimalloc-sys crate bindings (extended)
+        run: cargo run --features extended -p libmimalloc-sys-test
 
   lint:
     name: Rustfmt / Clippy
diff --git a/Cargo.toml b/Cargo.toml
index 3b3c137..993e9f0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,3 +31,4 @@ debug = ["libmimalloc-sys/debug"]
 debug_in_debug = ["libmimalloc-sys/debug_in_debug"]
 local_dynamic_tls = ["libmimalloc-sys/local_dynamic_tls"]
 no_thp = ["libmimalloc-sys/no_thp"]
+extended = ["libmimalloc-sys/extended"]
diff --git a/src/extended.rs b/src/extended.rs
new file mode 100644
index 0000000..9b6a9a0
--- /dev/null
+++ b/src/extended.rs
@@ -0,0 +1,21 @@
+use crate::MiMalloc;
+
+impl MiMalloc {
+    /// Get the mimalloc version.
+    ///
+    /// For mimalloc version 1.8.6, this will return 186.
+    pub fn version(&self) -> u32 {
+        unsafe { ffi::mi_version() as u32 }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn it_gets_version() {
+        let version = MiMalloc.version();
+        assert!(version != 0);
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 8943907..fffab98 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,6 +25,9 @@
 
 extern crate libmimalloc_sys as ffi;
 
+#[cfg(feature = "extended")]
+mod extended;
+
 use core::alloc::{GlobalAlloc, Layout};
 use core::ffi::c_void;
 use ffi::*;