diff --git a/src/core/colorspace.js b/src/core/colorspace.js
index 5daa7cc89..6277e8618 100644
--- a/src/core/colorspace.js
+++ b/src/core/colorspace.js
@@ -304,7 +304,7 @@ var ColorSpace = (function ColorSpaceClosure() {
           }
           break;
         case 'Pattern':
-          var basePatternCS = xref.fetchIfRef(cs[1]) || null;
+          var basePatternCS = cs[1] || null;
           if (basePatternCS) {
             basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
           }
@@ -312,7 +312,7 @@ var ColorSpace = (function ColorSpaceClosure() {
         case 'Indexed':
         case 'I':
           var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
-          var hiVal = cs[2] + 1;
+          var hiVal = xref.fetchIfRef(cs[2]) + 1;
           var lookup = xref.fetchIfRef(cs[3]);
           if (isStream(lookup)) {
             lookup = lookup.getBytes();
@@ -320,7 +320,7 @@ var ColorSpace = (function ColorSpaceClosure() {
           return ['IndexedCS', baseIndexedCS, hiVal, lookup];
         case 'Separation':
         case 'DeviceN':
-          var name = cs[1];
+          var name = xref.fetchIfRef(cs[1]);
           numComps = 1;
           if (isName(name)) {
             numComps = 1;