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-rw-r--r--include/decimal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/decimal.h b/include/decimal.h
index e1a495f1f2b..5ff0a18f085 100644
--- a/include/decimal.h
+++ b/include/decimal.h
@@ -76,7 +76,7 @@ int decimal_round(decimal *from, decimal *to, int new_scale, dec_round_mode mode
#define decimal_string_size(dec) ((dec)->intg + (dec)->frac + ((dec)->frac > 0) + 1)
/* negate a decimal */
-#define decimal_neg(dec) do { (dec)->sign=!(dec)->sign; } while(0)
+#define decimal_neg(dec) do { (dec)->sign^=1; } while(0)
/*
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