diff --git a/src/journal/journal-internal.h b/src/journal/journal-internal.h
index 1454df602b..e1fb01a6e3 100644
--- a/src/journal/journal-internal.h
+++ b/src/journal/journal-internal.h
@@ -41,10 +41,10 @@ struct Match {
 struct Location {
         LocationType type;
 
-        bool seqnum_set;
-        bool realtime_set;
-        bool monotonic_set;
-        bool xor_hash_set;
+        bool seqnum_set:1;
+        bool realtime_set:1;
+        bool monotonic_set:1;
+        bool xor_hash_set:1;
 
         uint64_t seqnum;
         sd_id128_t seqnum_id;