diff --git a/lld/MachO/UnwindInfoSection.cpp b/lld/MachO/UnwindInfoSection.cpp
--- a/lld/MachO/UnwindInfoSection.cpp
+++ b/lld/MachO/UnwindInfoSection.cpp
@@ -506,7 +506,7 @@
     secondLevelPages.emplace_back();
     SecondLevelPage &page = secondLevelPages.back();
     page.entryIndex = i;
-    uintptr_t functionAddressMax =
+    uint64_t functionAddressMax =
         cuEntries[idx].functionAddress + COMPRESSED_ENTRY_FUNC_OFFSET_MASK;
     size_t n = commonEncodings.size();
     size_t wordsRemaining =