diff --git a/CHardklorSetting.h b/CHardklorSetting.h
index 3cf6d72..3b3e5df 100644
--- a/CHardklorSetting.h
+++ b/CHardklorSetting.h
@@ -19,6 +19,7 @@ limitations under the License.
 
 #include <cstdio>
 #include <string>
+#include <cstring>
 #include <vector>
 
 #include "HardklorTypes.h"
