diff --git a/core/Makefile b/core/Makefile
index b245d32..d09f54f 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -6211,6 +6211,8 @@
     echo "virtual_ab_retrofit=true" >> $(1))
   $(if $(PRODUCT_VIRTUAL_AB_COW_VERSION), \
     echo "virtual_ab_cow_version=$(PRODUCT_VIRTUAL_AB_COW_VERSION)" >> $(1))
+  $(if $(PRODUCT_VIRTUAL_AB_COMPRESSION_FACTOR), \
+    echo "virtual_ab_compression_factor=$(PRODUCT_VIRTUAL_AB_COMPRESSION_FACTOR)" >> $(1))
 endef
 
 # Copy an image file to a directory and generate a block list map file from the image,
diff --git a/core/product.mk b/core/product.mk
index 9752f32..23b5d0a 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -447,6 +447,9 @@
 # specified we default to COW version 2 in update_engine for backwards compatibility
 _product_single_value_vars += PRODUCT_VIRTUAL_AB_COW_VERSION
 
+# Specifies maximum bytes to be compressed at once during ota. Options: 4096, 8192, 16384, 32768, 65536, 131072, 262144.
+_product_single_value_vars += PRODUCT_VIRTUAL_AB_COMPRESSION_FACTOR
+
 # If set, determines whether the build system checks vendor seapp contexts violations.
 _product_single_value_vars += PRODUCT_CHECK_VENDOR_SEAPP_VIOLATIONS