diff --git a/src/core/utils.c b/src/core/utils.c
index b430d13..75aaaec 100644
--- a/src/core/utils.c
+++ b/src/core/utils.c
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <string.h>             /*for SIGTERM */
 #include <math.h>
+#include <ctype.h>
 #include <fontconfig/fontconfig.h>
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
@@ -34,6 +35,8 @@
 #ifdef _MACH_O_
 #include <mach-o/dyld.h>
 #endif
+void gtk_widget_set_tooltip_text (GtkWidget   *widget, const gchar *text) { }
+void gtk_widget_set_tooltip_markup (GtkWidget   *widget, const gchar *text) { }
 
 /**
  * This checks to see if there's a .denemo/ directory in the user's
@@ -2683,7 +2686,13 @@ get_executable_dir ()
     _NSGetExecutablePath (path, &size);
 
 #else
-   readlink("/proc/self/exe", path, sizeof(path));
+   int n;
+   if ((n = readlink("/proc/self/exe", path, sizeof(path))) < 0)
+   {
+        perror("/proc/self/exe");
+        exit (1);
+   }
+   path[n] = 0;
 
 #endif
     dir = g_path_get_dirname(path);