diff --git a/libpurgeablemem/interfaces/kits/c/BUILD.gn b/libpurgeablemem/interfaces/kits/c/BUILD.gn
index a2ae01d826babb6df89bf3e270d9abab17755400..6ffd6731c1ec8012832cebebbb184c44e61d3f77 100644
--- a/libpurgeablemem/interfaces/kits/c/BUILD.gn
+++ b/libpurgeablemem/interfaces/kits/c/BUILD.gn
@@ -22,4 +22,6 @@ ohos_ndk_library("libpurgeable_memory_ndk") {
   output_name = "purgeable_memory_ndk"
   output_extension = "z.so"
   ndk_description_file = "./libpurgeable_memory.ndk.json"
+  system_capability = "SystemCapability.CommonLibrary.Memory.PurgeableMemory"
+  system_capability = "purgeable_memory/purgeable_memory.h"
 }
diff --git a/libpurgeablemem/interfaces/kits/c/purgeable_memory.h b/libpurgeablemem/interfaces/kits/c/purgeable_memory.h
index a76006452c3875c3fb69307e1724a558b7f21b53..41250458d1c3f37e710592d5430ce9bd8580b1b1 100644
--- a/libpurgeablemem/interfaces/kits/c/purgeable_memory.h
+++ b/libpurgeablemem/interfaces/kits/c/purgeable_memory.h
@@ -29,7 +29,8 @@
  *
  * @brief provides memory management capabilities of purgeable memory.
  *
- * provides features include create, begin read ,end read, begin write, end write, rebuild, and so on
+ * provides features include create, begin read ,end read, begin write, end write, rebuild, and so on.
+ * when using, it is necessary to link libpurgeable_memory_ndk.z.so
  *
  * @since 10
  * @version 1.0