diff --git a/pvmfw/src/entry.rs b/pvmfw/src/entry.rs
index 99c67fb..1ea95bc 100644
--- a/pvmfw/src/entry.rs
+++ b/pvmfw/src/entry.rs
@@ -14,7 +14,7 @@
 
 //! Low-level entry and exit points of pvmfw.
 
-use crate::helpers::FDT_MAX_SIZE;
+use crate::helpers;
 use crate::mmio_guard;
 use core::arch::asm;
 use core::slice;
@@ -54,6 +54,7 @@
     // - only access non-pvmfw memory once (and while) it has been mapped
     logger::init(LevelFilter::Info).map_err(|_| RebootReason::InternalError)?;
 
+    const FDT_MAX_SIZE: usize = helpers::SIZE_2MB;
     // TODO: Check that the FDT is fully contained in RAM.
     // SAFETY - We trust the VMM, for now.
     let fdt = unsafe { slice::from_raw_parts_mut(fdt as *mut u8, FDT_MAX_SIZE) };
diff --git a/pvmfw/src/helpers.rs b/pvmfw/src/helpers.rs
index cade62e..adfc189 100644
--- a/pvmfw/src/helpers.rs
+++ b/pvmfw/src/helpers.rs
@@ -14,8 +14,8 @@
 
 //! Miscellaneous helper functions.
 
-pub const FDT_MAX_SIZE: usize = 2 << 20;
 pub const SIZE_4KB: usize = 4 << 10;
+pub const SIZE_2MB: usize = 2 << 20;
 
 /// Computes the address of the page containing a given address.
 pub const fn page_of(addr: usize, page_size: usize) -> usize {