diff --git a/Source/Core/DiscIO/VolumeGC.cpp b/Source/Core/DiscIO/VolumeGC.cpp
index 78e2dd2f63..64c0daefca 100644
--- a/Source/Core/DiscIO/VolumeGC.cpp
+++ b/Source/Core/DiscIO/VolumeGC.cpp
@@ -215,7 +215,7 @@ VolumeGC::ConvertedGCBanner VolumeGC::LoadBannerFile() const
   }
   else
   {
-    WARN_LOG(DISCIO, "Invalid opening.bnr. Type: %0x Size: %0zx", banner_file.id, file_size);
+    WARN_LOG(DISCIO, "Invalid opening.bnr. Type: %0x Size: %0" PRIx64, banner_file.id, file_size);
     return {};
   }