diff -r f8900a5ad4a7 -r abfeed05c323 src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML
--- a/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Thu Oct 08 16:36:00 2020 +0200
+++ b/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Thu Oct 08 17:02:56 2020 +0200
@@ -29,10 +29,10 @@
 open ATP_Problem_Generate
 open ATP_Proof
 open ATP_Proof_Reconstruct
-open ATP_Systems
 open Sledgehammer_Util
 open Sledgehammer_Proof_Methods
 open Sledgehammer_Isar
+open Sledgehammer_ATP_Systems
 open Sledgehammer_Prover
 
 (* Empty string means create files in Isabelle's temporary files directory. *)