1 files changed, 2 insertions, 2 deletions
diff --git a/dsimple.h b/dsimple.h
index eb77c7e..4103790 100644
--- a/dsimple.h
+++ b/dsimple.h
@@ -49,7 +49,7 @@ from The Open Group.
 
     /* Global variables used by routines in just_display.c */
 
-extern char *program_name;                   /* Name of this program */
+extern const char *program_name;             /* Name of this program */
 extern Display *dpy;                         /* The current display */
 extern int screen;                           /* The current screen */
 
@@ -80,4 +80,4 @@ void usage(void);
 Window Select_Window(Display *, int descend);
 Window Window_With_Name(Display *, Window, const char *);
 
-void Fatal_Error(char *, ...) _X_NORETURN _X_ATTRIBUTE_PRINTF(1,2);
+void Fatal_Error(const char *, ...) _X_NORETURN _X_ATTRIBUTE_PRINTF(1,2);