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-rw-r--r--mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
index 98b4c042d..acad28bd8 100644
--- a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
+++ b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
@@ -33,7 +33,7 @@ usage(const char *name)
static const char *const usage_msg[] = {
"switches:",
"-c check syntax only",
- "-o<outfile> place the output into <outfile>",
+ "-o<outfile> place the output into <outfile>; required for multi-files",
"-v print version number, then turn on verbose mode",
"-g produce debugging information",
"-B<symbol> binary <symbol> output in C language format",