diff --git a/ChangeLog b/ChangeLog
index ea3983b..dc6e3cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2017-08-02  Jay Berkenbilt  <ejb@ql.org>
+
+	* Fix off-by-one error in parsing pages options. Fixes #129.
+
 2017-07-29  Jay Berkenbilt  <ejb@ql.org>
 
 	* Support @filename and @- in the qpdf command-line tool to read
diff --git a/qpdf/qpdf.cc b/qpdf/qpdf.cc
index 368b9bb..5d19562 100644
--- a/qpdf/qpdf.cc
+++ b/qpdf/qpdf.cc
@@ -855,7 +855,7 @@ parse_pages_options(
         {
             break;
         }
-        if (cur_arg + 2 >= argc)
+        if (cur_arg + 1 >= argc)
         {
             usage("insufficient arguments to --pages");
         }