diff --git a/lld/MachO/ConcatOutputSection.cpp b/lld/MachO/ConcatOutputSection.cpp
--- a/lld/MachO/ConcatOutputSection.cpp
+++ b/lld/MachO/ConcatOutputSection.cpp
@@ -348,7 +348,7 @@
 
   constexpr uint32_t strictFlags = S_ATTR_DEBUG | S_ATTR_STRIP_STATIC_SYMS |
                                    S_ATTR_NO_DEAD_STRIP | S_ATTR_LIVE_SUPPORT;
-  if ((input->flags ^ flags) & strictFlags)
+  if (input->flags && ((input->flags ^ flags) & strictFlags))
     error("Cannot merge section " + input->name + " (flags=0x" +
           to_hexString(input->flags) + ") into " + name + " (flags=0x" +
           to_hexString(flags) + "): strict flags differ");