1 files changed, 3 insertions, 3 deletions

diff --git a/frontend/print.cpp b/frontend/print.cpp
index 396e9ad..0c60892 100644
--- a/frontend/print.cpp
+++ b/frontend/print.cpp
@@ -57,15 +57,15 @@ SessionLog::SessionLog() {
 	this->file = { file, [] (FILE * file) { fclose(file); } };
 }
 
-void SessionLog::append(const string & str) {
+void SessionLog::append(const string & str) const {
 	this->append(str.data(), str.size());
 }
 
-void SessionLog::append(const char * str) {
+void SessionLog::append(const char * str) const {
 	this->append(str, strlen(str));
 }
 
-void SessionLog::append(const char * buf, size_t buf_size) {
+void SessionLog::append(const char * buf, size_t buf_size) const {
 	if (this->file == nullptr) return;
 	if (buf_size == 0) return;
 	fwrite(buf, 1, buf_size, this->file.get());