diff --git a/COFF/InputFiles.h b/COFF/InputFiles.h
index 1004432..672461c 100644
--- a/COFF/InputFiles.h
+++ b/COFF/InputFiles.h
@@ -294,7 +294,7 @@
   // symbols in the real symbol table) are filled with null pointers.
   std::vector<Symbol *> symbols;
 
-  DWARFCache *dwarf;
+  DWARFCache *dwarf = nullptr;
 };
 
 // This type represents import library members that contain DLL names