diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index e40aee5..0508b9f 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1496,7 +1496,9 @@
 }
 
 void MachineInstr::dump() const {
+#ifndef NDEBUG
   dbgs() << "  " << *this;
+#endif
 }
 
 static void printDebugLoc(DebugLoc DL, const MachineFunction *MF,