diff --git a/ext/rsruby.h b/ext/rsruby.h
index ffde0d8..4b91039 100644
--- a/ext/rsruby.h
+++ b/ext/rsruby.h
@@ -60,7 +60,7 @@
 # define CleanEd Rf_CleanEd
 extern void CleanEd(void);
 extern int R_CollectWarnings; 
-# define PrintWarnings Rf_PrintWarnings
+# define PrintWarnings() ; // NOTE: Rf_PrintWarnings removed in R 3.x
 extern void PrintWarnings(void);
 
 void Init_rsruby();