diff --git a/bolt/lib/Rewrite/MachORewriteInstance.cpp b/bolt/lib/Rewrite/MachORewriteInstance.cpp
--- a/bolt/lib/Rewrite/MachORewriteInstance.cpp
+++ b/bolt/lib/Rewrite/MachORewriteInstance.cpp
@@ -527,6 +527,7 @@
   mapCodeSections();
   mapInstrumentationSection("__counters");
   mapInstrumentationSection("__tables");
+  RTDyld->finalizeWithMemoryManagerLocking();
 
           // TODO: Refactor addRuntimeLibSections to work properly on Mach-O
           // and use it here.