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--- a/src/qtgui/fragbuts.h
+++ b/src/qtgui/fragbuts.h
@@ -17,6 +17,9 @@
 
 #ifndef _FRAGBUTS_H_INCLUDED_
 #define _FRAGBUTS_H_INCLUDED_
+
+#include <time.h>
+
 #include <string>
 #include <vector>
 
@@ -47,6 +50,7 @@
 
     void getfrags(std::vector<std::string>&);
 	bool ok() {return m_ok;}
+    bool isStale(time_t *reftime);
 private slots:
     void onButtonClicked(bool);
 
@@ -54,10 +58,10 @@
     void fragmentsChanged();
 
 private:
-    // Detect source file change
+    std::vector<ButFrag> m_buttons;
+    std::string m_fn;
     time_t m_reftime; 
-    std::vector<ButFrag> m_buttons;
-	bool m_ok;
+    bool m_ok;
  };