diff --git a/unified-runtime/source/loader/layers/sanitizer/asan/asan_ddi.cpp b/unified-runtime/source/loader/layers/sanitizer/asan/asan_ddi.cpp
index 0b4a64c38a549..53e6994631f18 100644
--- a/unified-runtime/source/loader/layers/sanitizer/asan/asan_ddi.cpp
+++ b/unified-runtime/source/loader/layers/sanitizer/asan/asan_ddi.cpp
@@ -516,6 +516,8 @@ __urdlllocal ur_result_t UR_APICALL urEnqueueKernelLaunch(
 
   LaunchInfo LaunchInfo(GetContext(hQueue), GetDevice(hQueue), pGlobalWorkSize,
                         pLocalWorkSize, pGlobalWorkOffset, workDim);
+  // When the kernel is filtered, it's still possible that LaunchInfo is used in
+  // kernel code, so the "syncToDevice" here will give it the default value.
   UR_CALL(LaunchInfo.Data.syncToDevice(hQueue));
 
   UR_CALL(getAsanInterceptor()->preLaunchKernel(hKernel, hQueue, LaunchInfo));