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-rw-r--r--include/ruby/ruby.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index d9a72d4424..1bb4671c54 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1304,7 +1304,7 @@ int rb_big_sign(VALUE);
#define FL_USER16 ((VALUE)RUBY_FL_USER16)
#define FL_USER17 ((VALUE)RUBY_FL_USER17)
#define FL_USER18 ((VALUE)RUBY_FL_USER18)
-#define FL_USER19 ((VALUE)RUBY_FL_USER19)
+#define FL_USER19 ((VALUE)(unsigned int)RUBY_FL_USER19)
#define RB_SPECIAL_CONST_P(x) (RB_IMMEDIATE_P(x) || !RB_TEST(x))
#define SPECIAL_CONST_P(x) RB_SPECIAL_CONST_P(x)