diff --git a/src/io/api.cc b/src/io/api.cc
index 2103c5317b8d15988b19d1c1bf07e1042a6453a0..0e254aa15ac06083038773d89c23d40242847782 100644
--- a/src/io/api.cc
+++ b/src/io/api.cc
@@ -12,6 +12,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
+#include "cstring"
 #include "io/paddle_inference_api.h"
 
 namespace paddle_mobile {