Support noerror option
diff --git a/include/usage.h b/include/usage.h
index ad34dfc..d0f3dfc 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -228,7 +228,7 @@
#define dd_trivial_usage \
"[if=FILE] [of=FILE] [bs=N] [count=N] [skip=N]\n" \
- "\t [seek=N] [conv=notrunc|sync]"
+ "\t [seek=N] [conv=notrunc|noerror|sync]"
#define dd_full_usage \
"Copy a file, converting and formatting according to options\n\n" \
"\tif=FILE\t\tread from FILE instead of stdin\n" \
@@ -238,6 +238,7 @@
"\tskip=N\t\tskip N input blocks\n" \
"\tseek=N\t\tskip N output blocks\n" \
"\tconv=notrunc\tdon't truncate output file\n" \
+ "\tconv=noerror\tcontinue after read errors\n" \
"\tconv=sync\tpad blocks with zeros\n" \
"\n" \
"Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \