diff --git a/lib/gssapi/gssapi/gssapi.h b/lib/gssapi/gssapi/gssapi.h
index 3c392d6e2..52cbdf31e 100644
--- a/lib/gssapi/gssapi/gssapi.h
+++ b/lib/gssapi/gssapi/gssapi.h
@@ -812,6 +812,8 @@ typedef struct {
 			 (GSS_IOV_BUFFER_TYPE_PADDING) */
 } gss_context_stream_sizes; 
 
+extern gss_OID GSSAPI_LIB_VARIABLE GSS_C_ATTR_STREAM_SIZES;
+
 
 OM_uint32 GSSAPI_LIB_FUNCTION
 gss_context_query_attributes(OM_uint32 * /* minor_status */,