diff --git a/modules/include/cas_ioctl_codes.h b/modules/include/cas_ioctl_codes.h
index bb2517a..37d6bc0 100644
--- a/modules/include/cas_ioctl_codes.h
+++ b/modules/include/cas_ioctl_codes.h
@@ -526,7 +526,7 @@ struct kcas_get_cache_param {
 #define KCAS_IOCTL_PURGE_CORE _IOWR(KCAS_IOCTL_MAGIC, 36, struct kcas_flush_core)
 
 /** Remove inactive core object from an running cache instance */
-#define KCAS_IOCTL_REMOVE_INACTIVE _IOR(KCAS_IOCTL_MAGIC, 37, struct kcas_remove_inactive)
+#define KCAS_IOCTL_REMOVE_INACTIVE _IOWR(KCAS_IOCTL_MAGIC, 37, struct kcas_remove_inactive)
 
 /**
  * Extended kernel CAS error codes