diff --git a/processor/memorylimiterprocessor/README.md b/processor/memorylimiterprocessor/README.md
index e00a96a771d..be875843624 100644
--- a/processor/memorylimiterprocessor/README.md
+++ b/processor/memorylimiterprocessor/README.md
@@ -101,7 +101,7 @@ This option is used to calculate `memory_limit` from the total available memory.
 For instance setting of 75% with the total memory of 1GiB will result in the limit of 750 MiB.
 The fixed memory setting (`limit_mib`) takes precedence
 over the percentage configuration.
-- `spike_limit_percentage` (default = 0): Maximum spike expected between the
+- `spike_limit_percentage` (default = 20% of `limit_percentage`): Maximum spike expected between the
 measurements of memory usage. The value must be less than `limit_percentage`.
 This option is used to calculate `spike_limit_mib` from the total available memory.
 For instance setting of 25% with the total memory of 1GiB will result in the spike limit of 250MiB.