diff --git a/object-cache.php b/object-cache.php
index 87ea8b8bf79ac041c1f4f1b19c0e10d6c6d643ff..1f312da8996a0fe4014b240dfbb7cc82b2c102a9 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -832,7 +832,7 @@ class WP_Object_Cache {
 			return true;
 		}
 
-		if ( $this->redis-exists( $derived_key ) ) {
+		if ( $this->redis->exists( $derived_key ) ) {
 			return false;
 		}
 
@@ -1010,4 +1010,4 @@ class WP_Object_Cache {
 
 		return false;
 	}
-}
\ No newline at end of file
+}