diff --git a/src/screen.c b/src/screen.c
index 6816503..1d4fdd3 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -10718,7 +10718,7 @@
 	/* cursor line shows absolute line number */
 	lnum = wp->w_buffer->b_ml.ml_line_count;
 
-    if (lnum == wp->w_nrwidth_line_count)
+    if (lnum == wp->w_nrwidth_line_count && wp->w_nuw_cached == wp->w_p_nuw)
 	return wp->w_nrwidth_width;
     wp->w_nrwidth_line_count = lnum;
 
@@ -10734,6 +10734,7 @@
 	n = wp->w_p_nuw - 1;
 
     wp->w_nrwidth_width = n;
+    wp->w_nuw_cached = wp->w_p_nuw;
     return n;
 }
 #endif