diff --git a/lld/MachO/MapFile.cpp b/lld/MachO/MapFile.cpp
--- a/lld/MachO/MapFile.cpp
+++ b/lld/MachO/MapFile.cpp
@@ -71,6 +71,15 @@
   return ret;
 }
 
+static writeSymbols(const std::vector<Defined *> &syms) {
+  os << "# Symbols:\n";
+  os << "# Address\t    File  Name\n";
+  for (Symbol *sym : syms) {
+    os << format("0x%08llX\t[%3u] %s\n", sym->getVA(),
+                 readerToFileOrdinal[sym->getFile()], symStr[sym].c_str());
+  }
+}
+
 void macho::writeMapFile() {
   if (config->mapFile.empty())
     return;
@@ -125,12 +134,6 @@
     }
 
   // Dump table of symbols
-  os << "# Symbols:\n";
-  os << "# Address\t    File  Name\n";
-  for (Symbol *sym : syms) {
-    os << format("0x%08llX\t[%3u] %s\n", sym->getVA(),
-                 readerToFileOrdinal[sym->getFile()], symStr[sym].c_str());
-  }
-
+  writeSymbols(syms)
   // TODO: when we implement -dead_strip, we should dump dead stripped symbols
 }