diff --git a/Source/Core/Core/HW/GCMemcard/GCMemcard.cpp b/Source/Core/Core/HW/GCMemcard/GCMemcard.cpp
index 8b15387e84..b3fe865ce1 100644
--- a/Source/Core/Core/HW/GCMemcard/GCMemcard.cpp
+++ b/Source/Core/Core/HW/GCMemcard/GCMemcard.cpp
@@ -882,9 +882,9 @@ u32 GCMemcard::ImportGciInternal(File::IOFile&& gci, const std::string& inputFil
 
   DEntry tempDEntry;
   gci.ReadBytes(&tempDEntry, DENTRY_SIZE);
-  const int fStart = (int)gci.Tell();
+  const u64 fStart = gci.Tell();
   gci.Seek(0, SEEK_END);
-  const int length = (int)gci.Tell() - fStart;
+  const u64 length = gci.Tell() - fStart;
   gci.Seek(offset + DENTRY_SIZE, SEEK_SET);
 
   Gcs_SavConvert(tempDEntry, offset, length);
@@ -1022,7 +1022,7 @@ u32 GCMemcard::ExportGci(u8 index, const std::string& fileName, const std::strin
     return WRITEFAIL;
 }
 
-void GCMemcard::Gcs_SavConvert(DEntry& tempDEntry, int saveType, int length)
+void GCMemcard::Gcs_SavConvert(DEntry& tempDEntry, int saveType, u64 length)
 {
   switch (saveType)
   {
diff --git a/Source/Core/Core/HW/GCMemcard/GCMemcard.h b/Source/Core/Core/HW/GCMemcard/GCMemcard.h
index 3bcd579476..bd3c03ce55 100644
--- a/Source/Core/Core/HW/GCMemcard/GCMemcard.h
+++ b/Source/Core/Core/HW/GCMemcard/GCMemcard.h
@@ -420,7 +420,7 @@ public:
 
   // GCI files are untouched, SAV files are byteswapped
   // GCS files have the block count set, default is 1 (For export as GCS)
-  static void Gcs_SavConvert(DEntry& tempDEntry, int saveType, int length = BLOCK_SIZE);
+  static void Gcs_SavConvert(DEntry& tempDEntry, int saveType, u64 length = BLOCK_SIZE);
 
   // reads the banner image
   bool ReadBannerRGBA8(u8 index, u32* buffer) const;