diff -ur free42-nologo-1.4.77.orig/gtk/shell_main.cc free42-nologo-1.4.77/gtk/shell_main.cc
--- free42-nologo-1.4.77.orig/gtk/shell_main.cc	2013-02-17 15:33:42.000000000 -0500
+++ free42-nologo-1.4.77/gtk/shell_main.cc	2023-01-24 16:54:59.541713230 -0500
@@ -963,7 +963,7 @@
 					    GTK_DIALOG_MODAL,
 					    GTK_MESSAGE_ERROR,
 					    GTK_BUTTONS_OK,
-					    message);
+					    "%s", message);
     gtk_window_set_title(GTK_WINDOW(msg), title);
     gtk_window_set_role(GTK_WINDOW(msg), "Free42 Dialog");
     gtk_dialog_run(GTK_DIALOG(msg));
@@ -1100,7 +1100,7 @@
 						GTK_DIALOG_MODAL,
 						GTK_MESSAGE_QUESTION,
 						GTK_BUTTONS_YES_NO,
-						buf);
+						"%s", buf);
 	gtk_window_set_title(GTK_WINDOW(msg), "Replace?");
 	gtk_window_set_role(GTK_WINDOW(msg), "Free42 Dialog");
 	cancelled = gtk_dialog_run(GTK_DIALOG(msg)) != GTK_RESPONSE_YES;