Index: bolt/lib/Core/BinaryContext.cpp
===================================================================
--- bolt/lib/Core/BinaryContext.cpp
+++ bolt/lib/Core/BinaryContext.cpp
@@ -1868,7 +1868,8 @@
   // Find a segment with a matching file offset.
   for (auto &KV : SegmentMapInfo) {
     const SegmentInfo &SegInfo = KV.second;
-    if (alignDown(SegInfo.FileOffset, SegInfo.Alignment) == FileOffset) {
+    if (alignDown(SegInfo.FileOffset, SegInfo.Alignment) ==
+        alignDown(FileOffset, SegInfo.Alignment)) {
       // Use segment's aligned memory offset to calculate the base address.
       const uint64_t MemOffset = alignDown(SegInfo.Address, SegInfo.Alignment);
       return MMapAddress - MemOffset;