1 files changed, 2 insertions, 2 deletions
diff --git a/src/io/inkscapestream.h b/src/io/inkscapestream.h
index ad213dad9..9c624af8f 100644
--- a/src/io/inkscapestream.h
+++ b/src/io/inkscapestream.h
@@ -475,7 +475,7 @@ public:
     virtual void put(gunichar ch) = 0;
     
     /* Formatted output */
-    virtual Writer& printf(char *fmt, ...) = 0;
+    virtual Writer& printf(char *fmt, ...) G_GNUC_PRINTF(2,3) = 0;
 
     virtual Writer& writeChar(char val) = 0;
 
@@ -531,7 +531,7 @@ public:
     
     
     /* Formatted output */
-    virtual Writer &printf(char *fmt, ...);
+    virtual Writer &printf(char *fmt, ...) G_GNUC_PRINTF(2,3);
 
     virtual Writer& writeChar(char val);