diff --git a/docs/reference/index-modules/cache.asciidoc b/docs/reference/index-modules/cache.asciidoc
index 472c55a4778..2b6334cfd67 100644
--- a/docs/reference/index-modules/cache.asciidoc
+++ b/docs/reference/index-modules/cache.asciidoc
@@ -17,7 +17,7 @@ recommended to use in almost all cases) is the `node` filter cache type.
 ==== Node Filter Cache
 
 The `node` filter cache may be configured to use either a percentage of
-the total memory allocated to the process or an specific amount of
+the total memory allocated to the process or a specific amount of
 memory. All shards present on a node share a single node cache (thats
 why its called `node`). The cache implements an LRU eviction policy:
 when a cache becomes full, the least recently used data is evicted to