diff --git a/include/YapInterface.h b/include/YapInterface.h
index 25e8b28a9..4f4f07944 100755
--- a/include/YapInterface.h
+++ b/include/YapInterface.h
@@ -331,6 +331,11 @@ extern X_API void PROTO(YAP_Write,(YAP_Term,void *,int));
 /*  void YAP_WriteBufffer(YAP_Term,char *,unsgined int,int) */
 extern X_API int PROTO(YAP_WriteBuffer,(YAP_Term,char *,size_t,int));
 
+/*  char* YAP_WriteDynamicBufffer(YAP_Term,char *,unsigned int,unsigned int
+*,int *,int) */
+extern X_API char* PROTO(YAP_WriteDynamicBuffer,(YAP_Term,char *,size_t,
+size_t *, int *, int));
+
 /*  void YAP_Term(YAP_Term) */
 extern X_API YAP_Term PROTO(YAP_CopyTerm,(YAP_Term));