diff --git a/am/arch/x86-nemu/include/arch.h b/am/arch/x86-nemu/include/arch.h
index 806cba8b..8d486194 100644
--- a/am/arch/x86-nemu/include/arch.h
+++ b/am/arch/x86-nemu/include/arch.h
@@ -3,7 +3,7 @@
 
 #include <am.h>
 
-#define PMEM_SIZE (64 * 1024 * 1024)
+#define PMEM_SIZE (128 * 1024 * 1024)
 #define PGSIZE    4096    // Bytes mapped by a page
 
 typedef uint32_t size_t;