diff --git a/documentation/Fl_Chart.html b/documentation/Fl_Chart.html
index cc00cce70..02ea2fec3 100644
--- a/documentation/Fl_Chart.html
+++ b/documentation/Fl_Chart.html
@@ -78,7 +78,7 @@ the chart values to <TT>a</TT> and <TT>b</TT> respectively.
 <H4><A name=Fl_Chart.insert>void insert(int pos, double value, const
 char *label = NULL, uchar color = 0)</A></H4>
  The <TT>insert</TT> method inserts a data value at the given position <TT>
-pos</TT>. Position 0 is the first data value.
+pos</TT>. Position 1 is the first data value.
 <H4><A name=Fl_Chart.maxsize>int maxsize(void) const
 <BR> void maxsize(int n)</A></H4>
 The <TT>maxsize</TT> method gets or sets the maximum number of data
@@ -87,7 +87,7 @@ be allowed to grow to any size depending on available memory.
 <H4><A name=Fl_Chart.replace>void replace(int pos, double value, const
 char *label = NULL, uchar color = 0)</A></H4>
  The <TT>replace</TT> method replaces data value <TT>pos</TT> with <TT>
-value</TT>, <TT>label</TT>, and <TT>color</TT>.  Position 0 is the
+value</TT>, <TT>label</TT>, and <TT>color</TT>.  Position 1 is the
 first data value.
 <H4><A name=Fl_Chart.size>int size(void) const</A></H4>
  The <TT>size</TT> method returns the number of data values in the