diff --git a/arch/risc-v/src/mpfs/mpfs_userspace.c b/arch/risc-v/src/mpfs/mpfs_userspace.c
index f457a26f6b949..7c13fd6a41ac3 100644
--- a/arch/risc-v/src/mpfs/mpfs_userspace.c
+++ b/arch/risc-v/src/mpfs/mpfs_userspace.c
@@ -54,7 +54,7 @@
 
 #define PGT_L1_SIZE     (512)  /* Enough to map 512 GiB */
 #define PGT_L2_SIZE     (512)  /* Enough to map 1 GiB */
-#define PGT_L3_SIZE     (1024) /* Enough to map 4 MiB */
+#define PGT_L3_SIZE     (2048) /* Enough to map 8 MiB */
 
 #define SLAB_COUNT      (sizeof(m_l3_pgtable) / RV_MMU_PAGE_SIZE)