diff --git a/particle.c b/particle.c
index c763776..9e5288b 100644
--- a/particle.c
+++ b/particle.c
@@ -8,5 +8,6 @@ particle_common_new(int left_margin, int right_margin)
     p->parent = NULL;
     p->left_margin = left_margin;
     p->right_margin = right_margin;
+    p->deco = NULL;
     return p;
 }