diff --git a/lib/SILOptimizer/Mandatory/CMakeLists.txt b/lib/SILOptimizer/Mandatory/CMakeLists.txt
index 4fdfc0cdae6d5..b441b241f5e38 100644
--- a/lib/SILOptimizer/Mandatory/CMakeLists.txt
+++ b/lib/SILOptimizer/Mandatory/CMakeLists.txt
@@ -23,4 +23,5 @@ silopt_register_sources(
   YieldOnceCheck.cpp
   MandatoryCombine.cpp
   OSLogOptimization.cpp
+  OwnershipModelEliminator.cpp
 )
diff --git a/lib/SILOptimizer/Transforms/OwnershipModelEliminator.cpp b/lib/SILOptimizer/Mandatory/OwnershipModelEliminator.cpp
similarity index 100%
rename from lib/SILOptimizer/Transforms/OwnershipModelEliminator.cpp
rename to lib/SILOptimizer/Mandatory/OwnershipModelEliminator.cpp
diff --git a/lib/SILOptimizer/Transforms/CMakeLists.txt b/lib/SILOptimizer/Transforms/CMakeLists.txt
index f92c461ac3dae..fbba6b0fcac59 100644
--- a/lib/SILOptimizer/Transforms/CMakeLists.txt
+++ b/lib/SILOptimizer/Transforms/CMakeLists.txt
@@ -21,7 +21,6 @@ silopt_register_sources(
   MergeCondFail.cpp
   Outliner.cpp
   ObjectOutliner.cpp
-  OwnershipModelEliminator.cpp
   PerformanceInliner.cpp
   RedundantLoadElimination.cpp
   RedundantOverflowCheckRemoval.cpp