diff --git a/patchoat/patchoat.cc b/patchoat/patchoat.cc
index a9b2a43..74f6779 100644
--- a/patchoat/patchoat.cc
+++ b/patchoat/patchoat.cc
@@ -761,6 +761,7 @@
 
 static int patchoat(int argc, char **argv) {
   InitLogging(argv);
+  MemMap::Init();
   const bool debug = kIsDebugBuild;
   orig_argc = argc;
   orig_argv = argv;