diff --git a/pmb/aportgen/device.py b/pmb/aportgen/device.py
index 197abb0c..af75e256 100644
--- a/pmb/aportgen/device.py
+++ b/pmb/aportgen/device.py
@@ -142,37 +142,23 @@ def generate_deviceinfo_fastboot_content(bootimg: Bootimg | None = None) -> str:
     content = f"""\
         deviceinfo_kernel_cmdline="{bootimg["cmdline"]}"
         deviceinfo_generate_bootimg="true"
-        deviceinfo_bootimg_qcdt="{bootimg["qcdt"]}"
-        deviceinfo_bootimg_dtb_second="{bootimg["dtb_second"]}"
         deviceinfo_flash_pagesize="{bootimg["pagesize"]}"
         """
 
-    if "qcdt_type" in bootimg.keys():
-        content += f"""\
-        deviceinfo_bootimg_qcdt_type="{bootimg["qcdt_type"]}"
-        """
-
-    if "mtk_label_kernel" in bootimg.keys():
-        content += f"""\
-        deviceinfo_mtk_label_kernel="{bootimg["mtk_label_kernel"]}"
-        """
-    if "mtk_label_ramdisk" in bootimg.keys():
-        content += f"""\
-        deviceinfo_mtk_label_ramdisk="{bootimg["mtk_label_ramdisk"]}"
-        """
-
-    if "header_version" in bootimg.keys():
-        content += f"""\
-        deviceinfo_header_version="{bootimg["header_version"]}"
-        """
-
-        if bootimg["header_version"] == "2":
+    for k in ["qcdt_type", "dtb_second", "mtk_label_kernel", "mtk_label_ramdisk", "header_version"]:
+        v = bootimg[k]  # type: ignore
+        if v:
             content += f"""\
-            deviceinfo_append_dtb="false"
-            deviceinfo_flash_offset_dtb="{bootimg["dtb_offset"]}"
+            deviceinfo_{k}="{v}"
             """
 
-    if "base" in bootimg.keys():
+    if bootimg["header_version"] == "2":
+        content += f"""\
+        deviceinfo_append_dtb="false"
+        deviceinfo_flash_offset_dtb="{bootimg["dtb_offset"]}"
+        """
+
+    if bootimg["base"]:
         content += f"""\
         deviceinfo_flash_offset_base="{bootimg["base"]}"
         deviceinfo_flash_offset_kernel="{bootimg["kernel_offset"]}"
diff --git a/pmb/parse/bootimg.py b/pmb/parse/bootimg.py
index 36c9e564..4021a4f1 100644
--- a/pmb/parse/bootimg.py
+++ b/pmb/parse/bootimg.py
@@ -171,7 +171,7 @@ def bootimg(path: Path) -> Bootimg:
             if value is not None
         }
     )
-    output["dtb_second"] = "true" if is_dtb(f"{bootimg_path}-second") else "false"
+    output["dtb_second"] = "true" if is_dtb(f"{bootimg_path}-second") else ""
 
     with open(f"{bootimg_path}-cmdline") as f:
         output["cmdline"] = trim_input(f)
@@ -185,11 +185,11 @@ def bootimg(path: Path) -> Bootimg:
         qcdt_type=output.get("qcdt_type"),
         dtb_offset=output.get("dtb_offset"),
         dtb_second=output["dtb_second"],
-        base=output["base"],
-        kernel_offset=output["kernel_offset"],
-        ramdisk_offset=output["ramdisk_offset"],
-        second_offset=output["second_offset"],
-        tags_offset=output["tags_offset"],
+        base=output.get("base", ""),
+        kernel_offset=output.get("kernel_offset", ""),
+        ramdisk_offset=output.get("ramdisk_offset", ""),
+        second_offset=output.get("second_offset", ""),
+        tags_offset=output.get("tags_offset", ""),
         pagesize=output["pagesize"],
         header_version=output.get("header_version"),
         mtk_label_kernel=output.get("mtk_label_kernel", ""),