diff --git a/core/Makefile b/core/Makefile
index 03f4555..eabe53b 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -849,6 +849,8 @@
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH),$(hide) echo "system_base_fs_file=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH)" >> $(1))
 $(if $(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "userdata_fs_type=$(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
 $(if $(BOARD_USERDATAIMAGE_PARTITION_SIZE),$(hide) echo "userdata_size=$(BOARD_USERDATAIMAGE_PARTITION_SIZE)" >> $(1))
+$(if $(BOARD_FLASH_LOGICAL_BLOCK_SIZE), $(hide) echo "flash_logical_block_size=$(BOARD_FLASH_LOGICAL_BLOCK_SIZE)" >> $(1))
+$(if $(BOARD_FLASH_ERASE_BLOCK_SIZE), $(hide) echo "flash_erase_block_size=$(BOARD_FLASH_ERASE_BLOCK_SIZE)" >> $(1))
 $(if $(BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "cache_fs_type=$(BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
 $(if $(BOARD_CACHEIMAGE_PARTITION_SIZE),$(hide) echo "cache_size=$(BOARD_CACHEIMAGE_PARTITION_SIZE)" >> $(1))
 $(if $(BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "vendor_fs_type=$(BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 1708d86..73cd07e 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -462,6 +462,10 @@
     build_command.extend(["-L", prop_dict["mount_point"]])
     if "extfs_inode_count" in prop_dict:
       build_command.extend(["-i", prop_dict["extfs_inode_count"]])
+    if "flash_erase_block_size" in prop_dict:
+      build_command.extend(["-e", prop_dict["flash_erase_block_size"]])
+    if "flash_logical_block_size" in prop_dict:
+      build_command.extend(["-o", prop_dict["flash_logical_block_size"]])
     if "selinux_fc" in prop_dict:
       build_command.append(prop_dict["selinux_fc"])
   elif fs_type.startswith("squash"):
@@ -665,6 +669,8 @@
     copy_prop("fs_type", "fs_type")
     copy_prop("userdata_fs_type", "fs_type")
     copy_prop("userdata_size", "partition_size")
+    copy_prop("flash_logical_block_size","flash_logical_block_size")
+    copy_prop("flash_erase_block_size", "flash_erase_block_size")
   elif mount_point == "cache":
     copy_prop("cache_fs_type", "fs_type")
     copy_prop("cache_size", "partition_size")