diff --git a/passes/opt/opt_muxtree.cc b/passes/opt/opt_muxtree.cc
index fc71dc8c5..867fab9a3 100644
--- a/passes/opt/opt_muxtree.cc
+++ b/passes/opt/opt_muxtree.cc
@@ -148,8 +148,8 @@ struct OptMuxtreeWorker
 		}
 		
 		// Limit the number of iterations based on the number of muxes.
-		// The multiplier (100) is arbitrary.
-		glob_abort_cnt = GetSize(mux2info) * 100;
+		// The multiplier (1000) is arbitrary.
+		glob_abort_cnt = GetSize(mux2info) * 1000;
 
 		// Populate mux2info[].ports[]:
 		//	.input_muxes