diff --git a/res/res_calendar_ews.c b/res/res_calendar_ews.c
index 51761127eb..d33f4be4fb 100644
--- a/res/res_calendar_ews.c
+++ b/res/res_calendar_ews.c
@@ -424,6 +424,8 @@ static int endelm(void *userdata, int state, const char *nspace, const char *nam
 		if (ast_str_strlen(ctx->cdata)) {
 			attendee->data = ast_strdup(ast_str_buffer(ctx->cdata));
 			AST_LIST_INSERT_TAIL(&ctx->event->attendees, attendee, next);
+		} else {
+			ast_free(attendee);
 		}
 		ast_debug(3, "EWS: XML: attendee address '%s'\n", ast_str_buffer(ctx->cdata));
 		ast_str_reset(ctx->cdata);