diff --git a/inc/pbuf.h b/inc/pbuf.h
index 8535246..ef303cd 100644
--- a/inc/pbuf.h
+++ b/inc/pbuf.h
@@ -6,6 +6,7 @@
 #include <stddef.h>
 
 #include <assert.h>
+#include <string.h>
 
 
 #ifdef __cplusplus