Fix an oversight in the arctangent generator
diff --git a/tests/scripts/arctangent.bc b/tests/scripts/arctangent.bc
index f4532ee..1339406 100755
--- a/tests/scripts/arctangent.bc
+++ b/tests/scripts/arctangent.bc
@@ -1,3 +1,6 @@
+#! /usr/bin/bc -q
+
+i = 0
 for (i = 1; i <= 100; ++i) {
 	print "scale = ", i, "\n"
 	"a(1)"