1 files changed, 1 insertions, 1 deletions

diff --git a/src/intervals.c b/src/intervals.c
index c1a088b1065..5a6ff4f47d5 100644
--- a/src/intervals.c
+++ b/src/intervals.c
@@ -1135,7 +1135,7 @@ merge_properties_sticky (pleft, pright)
       tmp = Fassq (sym, Vtext_property_default_nonsticky);
       use_left = (lpresent
                   && ! (TMEM (sym, lrear)
-                        || CONSP (tmp) && ! NILP (XCDR (tmp))));
+                        || (CONSP (tmp) && ! NILP (XCDR (tmp)))));
       use_right = (TMEM (sym, rfront)
                    || (CONSP (tmp) && NILP (XCDR (tmp))));
       if (use_left && use_right)