diff --git a/frida_tools/apk.py b/frida_tools/apk.py
index c5b7e0d..c2c17ef 100644
--- a/frida_tools/apk.py
+++ b/frida_tools/apk.py
@@ -193,7 +193,7 @@ def insert_debuggable(self, name: int, resource_map: ResourceMap) -> None:
         attr_offset = None
         replace = False
         for insert_pos in range(self.attribute_count + 1):
-            attr_offset = 0x24 + struct.calcsize(self.ATTRIBUTE_FORMAT) * insert_pos
+            attr_offset = 0x24 + insert_pos * struct.calcsize(self.ATTRIBUTE_FORMAT)
             idx = int.from_bytes(chunk_data[attr_offset + 4 : attr_offset + 8], "little")
             res = resource_map.get_resource(idx)
             if res >= ResourceMap.DEBUGGING_RESOURCE: