diff --git a/src/lib/controllib/block/Block.hpp b/src/lib/controllib/block/Block.hpp
index 7c2fd4a524..556ab41df2 100644
--- a/src/lib/controllib/block/Block.hpp
+++ b/src/lib/controllib/block/Block.hpp
@@ -54,7 +54,7 @@ static const uint16_t maxChildrenPerBlock = 100;
 static const uint16_t maxParamsPerBlock = 100;
 static const uint16_t maxSubscriptionsPerBlock = 100;
 static const uint16_t maxPublicationsPerBlock = 100;
-static const uint8_t blockNameLengthMax = 80;
+static const uint8_t blockNameLengthMax = 40;
 
 // forward declaration
 class BlockParamBase;