diff --git a/llvm/lib/System/Program.cpp b/llvm/lib/System/Program.cpp
index 22c38e2..e91a3d5 100644
--- a/llvm/lib/System/Program.cpp
+++ b/llvm/lib/System/Program.cpp
@@ -32,3 +32,4 @@
 #include "Win32/Program.inc"
 #endif
 
+DEFINING_FILE_FOR(SystemProgram)