diff --git a/llvm/test/tools/dsymutil/X86/swift-ast-x86_64.test b/llvm/test/tools/dsymutil/X86/swift-ast-x86_64.test
--- a/llvm/test/tools/dsymutil/X86/swift-ast-x86_64.test
+++ b/llvm/test/tools/dsymutil/X86/swift-ast-x86_64.test
@@ -18,3 +18,6 @@
 
 RUN: dsymutil -oso-prepend-path %p/.. %p/../Inputs/swift-ast.macho.x86_64 -no-output -verbose 2>&1 | FileCheck %s --check-prefix=TIMESTAMP
 TIMESTAMP: warning: Timestamp mismatch
+
+RUN: dsymutil -s %T/swift-ast.dSYM/Contents/Resources/DWARF/swift-ast.macho.x86_64 | FileCheck %s --check-prefix=NAST
+NAST-NOT: N_AST
diff --git a/llvm/tools/dsymutil/MachOUtils.cpp b/llvm/tools/dsymutil/MachOUtils.cpp
--- a/llvm/tools/dsymutil/MachOUtils.cpp
+++ b/llvm/tools/dsymutil/MachOUtils.cpp
@@ -163,6 +163,10 @@
   if ((NList.n_type & MachO::N_TYPE) == MachO::N_UNDF)
     return false;
 
+  // Do not transfer AST or OSO symbols as they're only needed by dsymutil.
+  if (NList.n_type == MachO::N_AST || NList.n_type == MachO::N_OSO)
+    return false;
+
   StringRef Name = StringRef(Strings.begin() + NList.n_strx);
   if (InDebugNote) {
     InDebugNote =