diff --git a/pdf.js b/pdf.js
index 7514f4d96..640cd637d 100644
--- a/pdf.js
+++ b/pdf.js
@@ -4506,7 +4506,7 @@ var PartialEvaluator = (function() {
           type: type.name,
           encoding: map,
           differences: [],
-          widths: widths,
+          widths: widths || {},
           defaultWidth: defaultWidth,
           firstChar: 0,
           lastChar: 256
diff --git a/test/pdfs/fips197.pdf.link b/test/pdfs/fips197.pdf.link
new file mode 100644
index 000000000..815eb1d48
--- /dev/null
+++ b/test/pdfs/fips197.pdf.link
@@ -0,0 +1 @@
+http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 1155195cb..7893faa18 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -109,5 +109,11 @@
        "link": true,
        "rounds": 1,
        "type": "eq"
+    },
+    {  "id": "fips197",
+       "file": "pdfs/fips197.pdf",
+       "link": true,
+       "rounds": 1,
+       "type": "load"
     }
 ]