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-rw-r--r--src/mapnode.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mapnode.h b/src/mapnode.h
index 1b10a546b..3b7ef5878 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -148,6 +148,8 @@ struct ContentFeatures
// If the content is liquid, this is the flowing version of the liquid.
// If content is liquid, this is the same content.
content_t liquid_alternative_flowing;
+ // If the content is liquid, this is the source version of the liquid.
+ content_t liquid_alternative_source;
// Amount of light the node emits
u8 light_source;