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-rw-r--r--src/mapnode.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mapnode.h b/src/mapnode.h
index d975a50c4..d4ba0fed5 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -141,8 +141,10 @@ struct ContentFeatures
NodeMetadata *initial_metadata;
// If the content is liquid, this is the flowing version of the liquid.
- // If content is liquid, this is the same content.
+ // If content is flowing liquid, this is the same content.
u8 liquid_alternative_flowing;
+ // If the content is liquid, this is the source version of the liquid.
+ u8 liquid_alternative_source;
// Amount of light the node emits
u8 light_source;