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-rw-r--r--include/ruby/internal/encoding/encoding.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/internal/encoding/encoding.h b/include/ruby/internal/encoding/encoding.h
index a680651a81..a58f9f2b15 100644
--- a/include/ruby/internal/encoding/encoding.h
+++ b/include/ruby/internal/encoding/encoding.h
@@ -80,7 +80,7 @@ enum ruby_encoding_consts {
static inline void
RB_ENCODING_SET_INLINED(VALUE obj, int encindex)
{
- VALUE f = /* upcast */ encindex;
+ VALUE f = /* upcast */ RBIMPL_CAST((VALUE)encindex);
f <<= RUBY_ENCODING_SHIFT;
RB_FL_UNSET_RAW(obj, RUBY_ENCODING_MASK);