diff --git a/packages/leann-backend-hnsw/CMakeLists.txt b/packages/leann-backend-hnsw/CMakeLists.txt
index 2eff141..6ca6d55 100644
--- a/packages/leann-backend-hnsw/CMakeLists.txt
+++ b/packages/leann-backend-hnsw/CMakeLists.txt
@@ -60,6 +60,9 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
     # Use SVE optimization level for ARM64 (as seen in Faiss conda build)
     set(FAISS_OPT_LEVEL "sve" CACHE STRING "" FORCE)
     message(STATUS "Setting FAISS_OPT_LEVEL to 'sve' for ARM64")
+
+    # ARM64 compatibility: Faiss submodule has been modified to fix x86 header inclusion
+    message(STATUS "Using ARM64-compatible Faiss submodule")
 endif()
 
 # Additional optimization options from INSTALL.md
diff --git a/packages/leann-backend-hnsw/third_party/faiss b/packages/leann-backend-hnsw/third_party/faiss
index a036185..021ced0 160000
--- a/packages/leann-backend-hnsw/third_party/faiss
+++ b/packages/leann-backend-hnsw/third_party/faiss
@@ -1 +1 @@
-Subproject commit a0361858fc9cbc95239ef304d9c85d48bb2701c8
+Subproject commit 021ced0d9039a6a92a89e27555d55aee43c00a2e