1 files changed, 5 insertions, 0 deletions
diff --git a/sql/my_decimal.h b/sql/my_decimal.h
index 27fd33cffbe..b65e6aedaa2 100644
--- a/sql/my_decimal.h
+++ b/sql/my_decimal.h
@@ -290,6 +290,11 @@ int int2my_decimal(uint mask, longlong i, my_bool unsigned_flag, my_decimal *d)
 inline
 void my_decimal_neg(decimal_t *arg)
 {
+  if (decimal_is_zero(arg))
+  {
+    arg->sign= 0;
+    return;
+  }
   decimal_neg(arg);
 }