diff --git a/libbacktrace/UnwindPtrace.h b/libbacktrace/UnwindPtrace.h
index 05375dd..1e82117 100644
--- a/libbacktrace/UnwindPtrace.h
+++ b/libbacktrace/UnwindPtrace.h
@@ -19,7 +19,7 @@
 
 #include <string>
 
-#include "Backtrace.h"
+#include "BacktraceImpl.h"
 
 #include <libunwind.h>
 
@@ -32,8 +32,6 @@
 
   virtual std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset);
 
-  virtual BacktraceMap* CreateBacktraceMap(pid_t pid) { return new BacktraceMap(pid); }
-
 private:
   unw_addr_space_t addr_space_;
   struct UPT_info* upt_info_;