diff --git a/llvm/lib/ExecutionEngine/Orc/MemoryMapper.cpp b/llvm/lib/ExecutionEngine/Orc/MemoryMapper.cpp
index bb4568b991956e..b457c7297bed66 100644
--- a/llvm/lib/ExecutionEngine/Orc/MemoryMapper.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/MemoryMapper.cpp
@@ -423,6 +423,10 @@ SharedMemoryMapper::~SharedMemoryMapper() {
 
     UnmapViewOfFile(R.second.LocalAddr);
 
+#else
+
+    (void)R;
+
 #endif
   }
 }