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-rw-r--r--src/arith_yacc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/arith_yacc.c b/src/arith_yacc.c
index ad653ed..e473594 100644
--- a/src/arith_yacc.c
+++ b/src/arith_yacc.c
@@ -280,7 +280,7 @@ static intmax_t assignment(int var, int noeval)
 
 	return setvarint(val.name,
 			 op == ARITH_ASS ? result :
-			 do_binop(op - 11, lookupvarint(val.name), result));
+			 do_binop(op - 11, lookupvarint(val.name), result), 0);
 }
 
 intmax_t arith(const char *s)