diff --git a/aosp_husky_pgagnostic.mk b/aosp_husky_pgagnostic.mk
index 96803f5..0b10a4e 100644
--- a/aosp_husky_pgagnostic.mk
+++ b/aosp_husky_pgagnostic.mk
@@ -20,3 +20,6 @@ PRODUCT_MODEL := AOSP page-size agnostic Husky 64K ELF
 
 PRODUCT_NO_BIONIC_PAGE_SIZE_MACRO := true
 PRODUCT_MAX_PAGE_SIZE_SUPPORTED := 65536
+
+TARGET_USERDATAIMAGE_FILE_SYSTEM_TYPE := ext4
+
diff --git a/aosp_shiba_pgagnostic.mk b/aosp_shiba_pgagnostic.mk
index 8351681..9d2434c 100644
--- a/aosp_shiba_pgagnostic.mk
+++ b/aosp_shiba_pgagnostic.mk
@@ -20,3 +20,6 @@ PRODUCT_MODEL := AOSP page-size agnostic Shiba 64K ELF
 
 PRODUCT_NO_BIONIC_PAGE_SIZE_MACRO := true
 PRODUCT_MAX_PAGE_SIZE_SUPPORTED := 65536
+
+TARGET_USERDATAIMAGE_FILE_SYSTEM_TYPE := ext4
+