--- a/src/pngtile/main.c	Mon Jan 25 04:29:25 2010 +0200
+++ b/src/pngtile/main.c	Mon Jan 25 04:29:32 2010 +0200
@@ -46,7 +46,7 @@
         "\t-W, --width          set tile width\n"
         "\t-H, --height         set tile height\n"
         "\t-x, --x              set tile x offset\n"
-        "\t-y, --y              set tile z offset\n"
+        "\t-y, --y              set tile y offset\n"
         "\t-z, --zoom           set zoom factor (<0)\n"
         "\t-j, --threads        number of threads\n"
     );