diff --git a/WHATS_NEW b/WHATS_NEW
index 2ea3f2bd0..068f453a4 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.99 - 
 ===================================
+  Support discards for non-power-of-2 thin pool chunks.
   Automatically restore MISSING PVs with no MDAs.
   When no '-i' argument is given for RAID10, default to 2 stripes.
   Do not allow --splitmirrors on RAID10 logical volumes.
diff --git a/lib/activate/activate.h b/lib/activate/activate.h
index ba24d2a58..0a0c97eaa 100644
--- a/lib/activate/activate.h
+++ b/lib/activate/activate.h
@@ -51,6 +51,7 @@ enum {
 	THIN_FEATURE_EXTERNAL_ORIGIN		= (1 << 1),
 	THIN_FEATURE_HELD_ROOT			= (1 << 2),
 	THIN_FEATURE_BLOCK_SIZE			= (1 << 3),
+	THIN_FEATURE_DISCARDS_NON_POWER_2	= (1 << 4),
 };
 
 void set_activation(int activation);
diff --git a/lib/thin/thin.c b/lib/thin/thin.c
index 2b6c71f14..693b8b694 100644
--- a/lib/thin/thin.c
+++ b/lib/thin/thin.c
@@ -565,6 +565,12 @@ static int _thin_target_present(struct cmd_context *cmd,
 		/* FIXME Log this as WARNING later only if the user asked for the feature to be used but it's not present */
 			log_debug("Target " THIN_MODULE " does not support non power of 2 block sizes.");
 
+		if (maj >=1 && min >= 5)
+			_attrs |= THIN_FEATURE_DISCARDS_NON_POWER_2;
+		else
+		/* FIXME Log this as WARNING later only if the user asked for the feature to be used but it's not present */
+			log_debug("Target " THIN_MODULE " does not support discards for non power of 2 block sizes.");
+
 		_checked = 1;
 	}