diff --git a/lld/MachO/Writer.cpp b/lld/MachO/Writer.cpp
--- a/lld/MachO/Writer.cpp
+++ b/lld/MachO/Writer.cpp
@@ -328,7 +328,8 @@
   }
 
   uint32_t getSize() const override {
-    return alignTo(sizeof(dylib_command) + path.size() + 1, 8);
+    return alignToPowerOf2(sizeof(dylib_command) + path.size() + 1,
+                           target->wordSize);
   }
 
   void writeTo(uint8_t *buf) const override {
@@ -362,7 +363,8 @@
 class LCLoadDylinker final : public LoadCommand {
 public:
   uint32_t getSize() const override {
-    return alignTo(sizeof(dylinker_command) + path.size() + 1, 8);
+    return alignToPowerOf2(sizeof(dylinker_command) + path.size() + 1,
+                           target->wordSize);
   }
 
   void writeTo(uint8_t *buf) const override {