1 files changed, 1 insertions, 1 deletions
diff --git a/FL/Fl_Image.H b/FL/Fl_Image.H
index 690239b65..a32b29c4a 100644
--- a/FL/Fl_Image.H
+++ b/FL/Fl_Image.H
@@ -187,7 +187,7 @@ public:
     \see count(), w(), h(), data_w(), data_h(), d(), ld()
    */
   const char * const *data() const {return data_;}
-  int fail();
+  int fail() const;
   /**
     Releases an Fl_Image - the same as '\p delete \p this'.