diff --git a/CHANGES.md b/CHANGES.md
index d6baa49..1b4bc24 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -26,6 +26,7 @@ v1.6.0 - YYYY-MM-DD
 v1.5.5 - YYYY-MM-DD
 -------------------
 
+- Fixed unsupported filter error (Issue #130)
 - Fixed EOF comment written to the PDF (Issue #136)
 - Fixed TTF cmap underflow error.
 - Fixed some Clang warnings.
diff --git a/pdfio-stream.c b/pdfio-stream.c
index 4791b7c..528a3c9 100644
--- a/pdfio-stream.c
+++ b/pdfio-stream.c
@@ -623,7 +623,7 @@ _pdfioStreamOpen(pdfio_obj_t *obj,	// I - Object
     else
     {
       // Something else we don't support
-      _pdfioFileError(st->pdf, "Unsupported stream filter '%N'.", filter);
+      _pdfioFileError(st->pdf, "Unsupported stream filter '/%s'.", filter);
       goto error;
     }
   }