diff --git a/src/util.h b/src/util.h
index dbd1f37903a..533e5eb0b05 100644
--- a/src/util.h
+++ b/src/util.h
@@ -633,7 +633,7 @@ inline unsigned long long dczid_el0_block_size(void) {
 #if defined(__aarch64__)
   unsigned long long val;
   asm volatile("mrs %0, DCZID_EL0" : "=r" (val));
-  return 1ULL << (val & 0xF);
+  return 4ULL << (val & 0xF);
 #else
   FATAL() << "Reached AArch64-only code path on non-AArch64 architecture";
   return 0;