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-rw-r--r--include/mruby/boxing_word.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mruby/boxing_word.h b/include/mruby/boxing_word.h
index 0a3db4fc2..42ae05fea 100644
--- a/include/mruby/boxing_word.h
+++ b/include/mruby/boxing_word.h
@@ -7,7 +7,7 @@
#ifndef MRUBY_BOXING_WORD_H
#define MRUBY_BOXING_WORD_H
-#if defined(MRB_32BIT) && !defined(MRB_USE_FLOAT32)
+#if defined(MRB_32BIT) && !defined(MRB_USE_FLOAT32) && !defined(MRB_WORDBOX_NO_FLOAT_TRUNCATE)
# define MRB_WORDBOX_NO_FLOAT_TRUNCATE
#endif