diff --git a/src/Raku/Grammar.nqp b/src/Raku/Grammar.nqp
index b4aa5973459..9a5dbb2cb68 100644
--- a/src/Raku/Grammar.nqp
+++ b/src/Raku/Grammar.nqp
@@ -1474,13 +1474,13 @@ grammar Raku::Grammar is HLL::Grammar does Raku::Common {
                     self.EXPR-reduce(@termstack, @opstack);
                 }
 
-                if nqp::isnull(nqp::atkey(%inO, 'adverb')) {
-                    $more_infix := 0;
-                }
-                else {
+                if nqp::atkey(%inO,'adverb') {
                     nqp::push(@opstack, $infix);
                     self.EXPR-reduce(@termstack, @opstack);
                 }
+                else {
+                    $more_infix := 0;
+                }
             }
             last if $term_done;