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-rw-r--r--rts/RtsFlags.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/rts/RtsFlags.c b/rts/RtsFlags.c
index af1b2049f6..44c05cec3b 100644
--- a/rts/RtsFlags.c
+++ b/rts/RtsFlags.c
@@ -241,7 +241,8 @@ usage_text[] = {
" -? Prints this message and exits; the program is not executed",
" --info Print information about the RTS used by this program",
"",
-" -K<size> Sets the maximum stack size (default 8M) Egs: -K32k -K512k",
+" -K<size> Sets the maximum stack size (default: 80% of the heap)",
+" Egs: -K32k -K512k -K8M",
" -ki<size> Sets the initial thread stack size (default 1k) Egs: -ki4k -ki2m",
" -kc<size> Sets the stack chunk size (default 32k)",
" -kb<size> Sets the stack chunk buffer size (default 1k)",