diff --git a/bootloader/hos/fss.c b/bootloader/hos/fss.c
index 84fa965..abd25de 100644
--- a/bootloader/hos/fss.c
+++ b/bootloader/hos/fss.c
@@ -125,7 +125,11 @@ int parse_fss(launch_ctxt_t *ctxt, const char *path, fss0_sept_t *sept_ctxt)
 					stock = true;
 		}
 
+#ifdef HOS_MARIKO_STOCK_SECMON
 		if (stock && emummc_disabled && (pkg1_old || h_cfg.t210b01))
+#else
+		if (stock && emummc_disabled && pkg1_old)
+#endif
 			return 1;
 	}
 
diff --git a/bootloader/hos/hos.h b/bootloader/hos/hos.h
index a8b57ac..b5900c6 100644
--- a/bootloader/hos/hos.h
+++ b/bootloader/hos/hos.h
@@ -42,6 +42,9 @@
 #define HOS_PKG11_MAGIC 0x31314B50
 #define HOS_EKS_MAGIC   0x30534B45
 
+// Use official Mariko secmon when in stock.
+//#define HOS_MARIKO_STOCK_SECMON
+
 typedef struct _exo_ctxt_t
 {
 	bool fs_is_510;
diff --git a/bootloader/hos/pkg1.c b/bootloader/hos/pkg1.c
index e77d6f2..b4cd792 100644
--- a/bootloader/hos/pkg1.c
+++ b/bootloader/hos/pkg1.c
@@ -264,6 +264,7 @@ void pkg1_secmon_patch(void *hos_ctxt, u32 secmon_base, bool t210b01)
 		// For T210 till 6.2.0 the patching is used as is, because of no compression.
 		secmon_patchset = ctxt->pkg1_id->secmon_patchset;
 	}
+#ifdef HOS_MARIKO_STOCK_SECMON
 	else if (t210b01)
 	{
 		// For T210B01 we patch 6.X.X as is. Otherwise we decompress the program payload.
@@ -294,6 +295,7 @@ void pkg1_secmon_patch(void *hos_ctxt, u32 secmon_base, bool t210b01)
 			*(vu32 *)patch_offset = _NOP();
 		}
 	}
+#endif
 	else
 		return;