diff --git a/src/map.cpp b/src/map.cpp
index cf8692bff..aa064637f 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -1575,7 +1575,7 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
 			Collect information about current node
 		 */
 		s8 liquid_level = -1;
-		u8 liquid_kind;
+		u8 liquid_kind = CONTENT_IGNORE;
 		LiquidType liquid_type = content_features(n0.d).liquid_type;
 		switch (liquid_type) {
 			case LIQUID_SOURCE: