diff --git a/apps/stable_diffusion/src/utils/stable_args.py b/apps/stable_diffusion/src/utils/stable_args.py
index fdf1d179..1895915a 100644
--- a/apps/stable_diffusion/src/utils/stable_args.py
+++ b/apps/stable_diffusion/src/utils/stable_args.py
@@ -360,7 +360,7 @@ p.add_argument(
 
 p.add_argument(
     "--vulkan_large_heap_block_size",
-    default="4147483648",
+    default="2073741824",
     help="flag for setting VMA preferredLargeHeapBlockSize for vulkan device, default is 4G",
 )