diff --git a/pdf.js b/pdf.js
index 8f869a48a..7e47a3c57 100644
--- a/pdf.js
+++ b/pdf.js
@@ -4380,9 +4380,11 @@ var ColorSpace = (function() {
     constructor.parse = function colorspace_parse(cs, xref, res) {
         if (IsName(cs)) {
             var colorSpaces = res.get("ColorSpace");
-            var refcs = colorSpaces.get(cs.name);
-            if (refcs)
-                cs = refcs;
+            if (colorSpaces) {
+                var refcs = colorSpaces.get(cs.name);
+                if (refcs)
+                    cs = refcs;
+            }
         }
             
         cs = xref.fetchIfRef(cs);