diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index f11b28c7b..bfa6d55bf 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.138 - 
 =====================================
+  Cache status check for passthrough also require trailing space.
   Add extra memory page when limiting pthread stack size in dmeventd.
   Avoids immediate resume when preloaded device is smaller.
   Do not suppress kernel key description in dmsetup table output.
diff --git a/libdm/libdm-targets.c b/libdm/libdm-targets.c
index 6b8337234..8c987908e 100644
--- a/libdm/libdm-targets.c
+++ b/libdm/libdm-targets.c
@@ -274,7 +274,7 @@ int dm_get_status_cache(struct dm_pool *mem, const char *params,
 			s->feature_flags |= DM_CACHE_FEATURE_WRITETHROUGH;
 		else if (!strncmp(p, "writeback ", 10))
 			s->feature_flags |= DM_CACHE_FEATURE_WRITEBACK;
-		else if (!strncmp(p, "passthrough ", 11))
+		else if (!strncmp(p, "passthrough ", 12))
 			s->feature_flags |= DM_CACHE_FEATURE_PASSTHROUGH;
 		else
 			log_error("Unknown feature in status: %s", params);