diff --git a/macho/main.cc b/macho/main.cc
index cea33bae..91d69ed9 100644
--- a/macho/main.cc
+++ b/macho/main.cc
@@ -85,10 +85,6 @@ static void export_symbols(Context &ctx) {
 }
 
 static i64 assign_offsets(Context &ctx) {
-  for (OutputSegment *seg : ctx.segments)
-    for (Chunk *chunk : seg->chunks)
-      chunk->compute_size(ctx);
-
   i64 fileoff = 0;
   i64 vmaddr = PAGE_ZERO_SIZE;
 
diff --git a/macho/output-chunks.cc b/macho/output-chunks.cc
index 191d2fc3..50e63db7 100644
--- a/macho/output-chunks.cc
+++ b/macho/output-chunks.cc
@@ -277,6 +277,7 @@ void OutputSegment::set_offset(Context &ctx, i64 fileoff, u64 vmaddr) {
     offset = align_to(offset, 1 << sec->hdr.p2align);
     sec->hdr.addr = vmaddr + offset;
     sec->hdr.offset = fileoff + offset;
+    sec->compute_size(ctx);
     offset += sec->hdr.size;
   }