diff --git a/include/assimp/allocator.h b/include/assimp/allocator.h
index 35de1b911..0462cfc2b 100644
--- a/include/assimp/allocator.h
+++ b/include/assimp/allocator.h
@@ -45,19 +45,25 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <stddef.h>
 
 typedef void* (*alloc_func)(size_t size);
-typedef void* (*realloc_func)(void* ptr, size_t size);
 typedef void  (*free_func)(void* ptr);
 
 struct Allocator {
-    alloc_func alloc{nullptr};
-    realloc_func realloc{nullptr};
-    free_func free{nullptr};
+    static alloc_func alloc{nullptr};
+    static free_func free{nullptr};
+
+    static void init(alloc_func alloc_fn, free_func free_fn) {
+        alloc = alloc_fn;
+        free = free_fn;
+    }
 };
 
+static void aiRegisterAllocator(alloc_func alloc_fn, free_func free_fn) {
+    Allocator::init(alloc_fn, free_fn);
+}
+
 #define AI_NEW(ai_type,...) new ai_type(__VA_ARGS__)
 #define AI_NEW_ARRAY(ai_type,count) new ai_type[count]()
 #define AI_DELETE(ptr) delete ptr
 #define AI_DELETE_ARRAY(ptr) delete[] ptr
 
 #endif // AI_ALLOCATOR_H_INC
-