diff --git a/flashchips.c b/flashchips.c
index 9ae3c04..6987de8 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -20139,7 +20139,7 @@
 		.id.model	= SST_SST49LF040B,
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
-		.feature_bits	= FEATURE_EITHER_RESET,
+		.feature_bits	= FEATURE_EITHER_RESET, /* probing from 64KiB to 512KiB works */
 		.tested		= TEST_OK_PREW,
 		.probe_timing	= 1,		/* 150ns */
 		.block_erasers	=
@@ -25288,7 +25288,7 @@
 		.id.model	= WINBOND_W39V040B,
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
-		.feature_bits	= FEATURE_EITHER_RESET,
+		.feature_bits	= FEATURE_EITHER_RESET, /* probing from 64KiB to 512KiB works */
 		.tested		= TEST_OK_PREW,
 		.probe_timing	= 10,
 		.block_erasers	=