diff --git a/selection.c b/selection.c
index f460607a..7b94a359 100644
--- a/selection.c
+++ b/selection.c
@@ -387,11 +387,12 @@ unmark_selected(struct terminal *term, struct row *row, struct cell *cell,
         return;
     }
 
-    row->dirty = 1;
+    row->dirty = true;
     cell->attrs.selected = 0;
     cell->attrs.clean = 0;
 }
 
+
 static void
 premark_selected(struct terminal *term, struct row *row, struct cell *cell,
                  int col, void *data)
@@ -409,7 +410,7 @@ mark_selected(struct terminal *term, struct row *row, struct cell *cell,
         return;
     }
 
-    row->dirty = 1;
+    row->dirty = true;
     cell->attrs.selected = 1;
     cell->attrs.clean = 0;
 }