diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 51376d398..6a983a783 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.88 - 
 =================================
+  Increase bitset size for minors for thin dmeventd plugin.
 
 Version 1.02.85 - 10th April 2014
 =================================
diff --git a/daemons/dmeventd/plugins/thin/dmeventd_thin.c b/daemons/dmeventd/plugins/thin/dmeventd_thin.c
index 3126bfa02..b700b8d84 100644
--- a/daemons/dmeventd/plugins/thin/dmeventd_thin.c
+++ b/daemons/dmeventd/plugins/thin/dmeventd_thin.c
@@ -218,7 +218,8 @@ static int _umount_device(char *buffer, unsigned major, unsigned minor,
  */
 static void _umount(struct dm_task *dmt, const char *device)
 {
-	static const size_t MINORS = 4096;
+	/* TODO: Convert to use hash to reduce memory usage */
+	static const size_t MINORS = (1U << 20); /* 20 bit */
 	struct mountinfo_s data = {
 		.device = device,
 	};