diff --git a/lib/CodeGen/MachineLoopInfo.cpp b/lib/CodeGen/MachineLoopInfo.cpp
index 9f3829e..05d2f2a 100644
--- a/lib/CodeGen/MachineLoopInfo.cpp
+++ b/lib/CodeGen/MachineLoopInfo.cpp
@@ -74,6 +74,8 @@
   return BotMBB;
 }
 
+#ifndef NDEBUG
 void MachineLoop::dump() const {
   print(dbgs());
 }
+#endif