--- gdal-1.9.2/swig/include/ruby/typemaps_ruby.i.orig	2012-10-09 02:58:28.000000000 +0200
+++ gdal-1.9.2/swig/include/ruby/typemaps_ruby.i	2013-01-06 15:12:18.221272187 +0100
@@ -127,7 +127,7 @@
 {
   /* %typemap(out) OGRErr */
   if ($1 != 0) {
-    rb_raise(rb_eRuntimeError, OGRErrMessages(result));
+    rb_raise(rb_eRuntimeError, "%s", OGRErrMessages(result));
   }
 }