diff --git a/src/Etterna/MinaCalc/Dependent/HD_Sequencers/ChainSequencing.h b/src/Etterna/MinaCalc/Dependent/HD_Sequencers/ChainSequencing.h
index 318026935b..926f67fc13 100644
--- a/src/Etterna/MinaCalc/Dependent/HD_Sequencers/ChainSequencing.h
+++ b/src/Etterna/MinaCalc/Dependent/HD_Sequencers/ChainSequencing.h
@@ -54,7 +54,7 @@ struct Chain_Sequencer
 	/// to reset the current chain and continue a new one
 	void complete_seq()
 	{
-		assert(_len >= 0);
+		assert(cur_len >= 0);
 
 		// remove this check to consider 1111122222 a chain
 		// otherwise, only 11111[12]22222 is a chain