diff -r f0d9f873f470 -r c742527a25fe src/HOL/Tools/Predicate_Compile/predicate_compile_aux.ML
--- a/src/HOL/Tools/Predicate_Compile/predicate_compile_aux.ML	Thu Aug 01 14:46:50 2019 +0200
+++ b/src/HOL/Tools/Predicate_Compile/predicate_compile_aux.ML	Fri Aug 02 11:23:09 2019 +0200
@@ -844,7 +844,7 @@
     fun split_conjs i nprems th =
       if i > nprems then th
       else
-        (case try Drule.RSN (@{thm conjI}, (i, th)) of
+        (case try (op RSN) (@{thm conjI}, (i, th)) of
           SOME th' => split_conjs i (nprems + 1) th'
         | NONE => split_conjs (i + 1) nprems th)
   in