diff --git a/src/stage1/codegen.cpp b/src/stage1/codegen.cpp
index 5e9b84d25a..b8ac867082 100644
--- a/src/stage1/codegen.cpp
+++ b/src/stage1/codegen.cpp
@@ -1645,11 +1645,13 @@ static void gen_assign_raw(CodeGen *g, LLVMValueRef ptr, ZigType *ptr_type,
 
         ZigType *usize = g->builtin_types.entry_usize;
         uint64_t size_bytes = LLVMStoreSizeOfType(g->target_data_ref, get_llvm_type(g, child_type));
-        uint64_t align_bytes = get_ptr_align(g, ptr_type);
+        uint64_t src_align_bytes = get_abi_alignment(g, child_type);
+        uint64_t dest_align_bytes = get_ptr_align(g, ptr_type);
         assert(size_bytes > 0);
-        assert(align_bytes > 0);
+        assert(src_align_bytes > 0);
+        assert(dest_align_bytes > 0);
 
-        ZigLLVMBuildMemCpy(g->builder, dest_ptr, align_bytes, src_ptr, align_bytes,
+        ZigLLVMBuildMemCpy(g->builder, dest_ptr, dest_align_bytes, src_ptr, src_align_bytes,
                 LLVMConstInt(usize->llvm_type, size_bytes, false),
                 ptr_type->data.pointer.is_volatile);
         return;