diff --git a/passes/opt/opt_muxtree.cc b/passes/opt/opt_muxtree.cc
index 867fab9a3..6c3a5ec69 100644
--- a/passes/opt/opt_muxtree.cc
+++ b/passes/opt/opt_muxtree.cc
@@ -149,7 +149,7 @@ struct OptMuxtreeWorker
 		
 		// Limit the number of iterations based on the number of muxes.
 		// The multiplier (1000) is arbitrary.
-		glob_abort_cnt = GetSize(mux2info) * 1000;
+		glob_abort_cnt = max(100000, GetSize(mux2info) * 100);
 
 		// Populate mux2info[].ports[]:
 		//	.input_muxes