diff --git a/.gitignore b/.gitignore
index 13bbe5b..4714834 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .idea/
+cmake-build-debug/
 
diff --git a/dart/dart.h b/dart/dart.h
index 8e229c4..dfe05b8 100644
--- a/dart/dart.h
+++ b/dart/dart.h
@@ -19,12 +19,13 @@ enum class SnaphotKind: uint64_t {
     INVALID
 };
 
+#pragma pack (1)
 struct SnapshotHeader {
     uint32_t magic;
-    uint32_t size;
-    uint32_t size2;
+    int64_t size;
     SnaphotKind kind;
     std::array<char8_t, 32> versionHash;
 };
+#pragma pack (0)
 
 #endif //UNFLUTTER_DART_H
diff --git a/main.cpp b/main.cpp
index 743f7c3..f759d58 100644
--- a/main.cpp
+++ b/main.cpp
@@ -40,7 +40,5 @@ int main(int argc, char** argv) {
         std::cout << "Wrong magic!!!!" << std::endl;
     }
 
-    auto sizer = __builtin_bswap32(header->size);
-
     return 0;
 }