diff --git a/caffe2/serialize/inline_container.h b/caffe2/serialize/inline_container.h
index 20a75ae6c36..c43467c0ef6 100644
--- a/caffe2/serialize/inline_container.h
+++ b/caffe2/serialize/inline_container.h
@@ -91,7 +91,7 @@ namespace caffe2 {
 namespace serialize {
 
 constexpr uint64_t kMinSupportedFileFormatVersion = 0x1L;
-constexpr uint64_t kMaxSupportedFileFormatVersion = 0x4L;
+constexpr uint64_t kMaxSupportedFileFormatVersion = 0x5L;
 
 // Versions (i.e. why was the version number bumped?)
 // 1. Initial version
@@ -99,6 +99,8 @@ constexpr uint64_t kMaxSupportedFileFormatVersion = 0x4L;
 // 3. Added type tags to pickle serialization of container types
 // 4. Stopped integer division using torch.div
 //      (a versioned symbol preserves the historic behavior of versions 1--3)
+// 5. (Read-only) Stops torch.full inferring a floating point dtype
+//      when given integer fill values.
 constexpr uint64_t kProducedFileFormatVersion = 0x4L;
 
 // Writer-specific constants