diff --git a/main.cpp b/main.cpp
index 69e160f..6185400 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4613,9 +4613,14 @@ void sign_guts_elf(elf_file* elf, private_t private_key, public_t public_key) {
         std::shared_ptr<entry_point_item> entry_point = new_block.get_item<entry_point_item>();
         if (entry_point == nullptr) {
             std::shared_ptr<vector_table_item> vtor = new_block.get_item<vector_table_item>();
-            uint32_t vtor_loc = 0x10000000;
+            uint32_t vtor_loc = elf->header().entry < SRAM_START ? 0x10000000 : 0x20000000;
             if (vtor != nullptr) {
                 vtor_loc = vtor->addr;
+            } else {
+                std::shared_ptr<rolling_window_delta_item> rwd = new_block.get_item<rolling_window_delta_item>();
+                if (rwd != nullptr) {
+                    vtor_loc += rwd->addr;
+                }
             }
             auto segment = elf->segment_from_physical_address(vtor_loc);
             auto content = elf->content(*segment);