--- lib/help.c.orig	Sat Mar 24 12:00:49 2012
+++ lib/help.c	Wed Aug  3 00:53:26 2016
@@ -520,8 +520,11 @@ help(char *filename, char *text)
   {
     int end_para = 0;
     Word *w = words+i;
-    int ts = (thin_space[words[i-1].flags & STYLE_BITS]
-	      + thin_space[words[i].flags & STYLE_BITS])/2;
+    int ts = thin_space[words[i].flags & STYLE_BITS];
+    if (i != 0)
+    {
+      ts = (ts + thin_space[words[i-1].flags & STYLE_BITS])/2;
+    }
 
     /* decide when we're done with a row */
 #if 0