diff --git a/fastdoubleparser-dev/src/main/java/ch.randelshofer.fastdoubleparser/ch/randelshofer/fastdoubleparser/ConfigurableDoubleParser.java b/fastdoubleparser-dev/src/main/java/ch.randelshofer.fastdoubleparser/ch/randelshofer/fastdoubleparser/ConfigurableDoubleParser.java
index 3379228c..91190f6d 100644
--- a/fastdoubleparser-dev/src/main/java/ch.randelshofer.fastdoubleparser/ch/randelshofer/fastdoubleparser/ConfigurableDoubleParser.java
+++ b/fastdoubleparser-dev/src/main/java/ch.randelshofer.fastdoubleparser/ch/randelshofer/fastdoubleparser/ConfigurableDoubleParser.java
@@ -166,8 +166,8 @@ public double parseDouble(CharSequence str) {
      * Parses a double value from a substring of the specified char sequence.
      *
      * @param str    a char sequence
-     * @param offset the start offset
-     * @param length the length
+     * @param offset the start offset of the substring
+     * @param length the length of the substring
      * @throws NumberFormatException if the provided char sequence could not be parsed
      */
     public double parseDouble(CharSequence str, int offset, int length) {
@@ -189,8 +189,8 @@ public double parseDouble(char[] str) {
      * Parses a double value from a substring of the specified char array.
      *
      * @param str    a char array
-     * @param offset the start offset
-     * @param length the length
+     * @param offset the start offset of the substring
+     * @param length the length of the substring
      * @throws NumberFormatException if the provided char array could not be parsed
      */
     public double parseDouble(char[] str, int offset, int length) {