Index: lib/ReaderWriter/MachO/GOTPass.cpp
===================================================================
--- lib/ReaderWriter/MachO/GOTPass.cpp
+++ lib/ReaderWriter/MachO/GOTPass.cpp
@@ -125,7 +125,7 @@
 
   bool shouldReplaceTargetWithGOTAtom(const Atom *target, bool canBypassGOT) {
     // Accesses to shared library symbols must go through GOT.
-    if (target->definition() == Atom::definitionSharedLibrary)
+    if (isa<SharedLibraryAtom>(target))
       return true;
     // Accesses to interposable symbols in same linkage unit must also go
     // through GOT.
Index: lib/ReaderWriter/MachO/StubsPass.cpp
===================================================================
--- lib/ReaderWriter/MachO/StubsPass.cpp
+++ lib/ReaderWriter/MachO/StubsPass.cpp
@@ -230,7 +230,7 @@
           continue;
         const Atom *target = ref->target();
         assert(target != nullptr);
-        if (target->definition() == Atom::definitionSharedLibrary) {
+        if (isa<SharedLibraryAtom>(target)) {
           // Calls to shared libraries go through stubs.
           replaceCalleeWithStub(target, ref);
           continue;