diff --git a/address_space/src/host_mmap.rs b/address_space/src/host_mmap.rs
index fa807a80e8b2a306b563e5cca84bf25b05703d06..a8107ba78fcea692ddf1d5daa540dc27f372432f 100644
--- a/address_space/src/host_mmap.rs
+++ b/address_space/src/host_mmap.rs
@@ -207,8 +207,13 @@ fn touch_pages(start: u64, page_size: u64, nr_pages: u64) {
 /// * `nr_vcpus` - Number of vcpus.
 fn mem_prealloc(host_addr: u64, size: u64, nr_vcpus: u8) {
     trace::trace_scope_start!(pre_alloc, args = (size));
-    let page_size = host_page_size();
+    let mut page_size = host_page_size();
     let threads = max_nr_threads(nr_vcpus);
+    // If the pagesize of the system is not obtained, we use the granularity
+    // of 4096 Bytes to allocate memory.
+    if page_size == 0 {
+        page_size = 4096;
+    }
     let nr_pages = (size + page_size - 1) / page_size;
     let pages_per_thread = nr_pages / u64::from(threads);
     let left = nr_pages % u64::from(threads);