diff --git a/src/core/colorspace.js b/src/core/colorspace.js
index 7f784ce2c..cf2dc3d2f 100644
--- a/src/core/colorspace.js
+++ b/src/core/colorspace.js
@@ -960,18 +960,6 @@ var CalRGBCS = (function CalRGBCSClosure() {
            '] for ' + this.name + ', falling back to default');
       this.GR = this.GG = this.GB = 1;
     }
-
-    if (this.MXA < 0 || this.MYA < 0 || this.MZA < 0 ||
-        this.MXB < 0 || this.MYB < 0 || this.MZB < 0 ||
-        this.MXC < 0 || this.MYC < 0 || this.MZC < 0) {
-      info('Invalid Matrix for ' + this.name + ' [' +
-           this.MXA + ', ' + this.MYA + ', ' + this.MZA +
-           this.MXB + ', ' + this.MYB + ', ' + this.MZB +
-           this.MXC + ', ' + this.MYC + ', ' + this.MZC +
-           '], falling back to default');
-      this.MXA = this.MYB = this.MZC = 1;
-      this.MXB = this.MYA = this.MZA = this.MXC = this.MYC = this.MZB = 0;
-    }
   }
 
   function matrixProduct(a, b, result) {
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index cd4cc8b70..0d5af9146 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -71,6 +71,7 @@
 !issue9418.pdf
 !issue9458.pdf
 !issue9915_reduced.pdf
+!issue9940.pdf
 !bad-PageLabels.pdf
 !decodeACSuccessive.pdf
 !filled-background.pdf
diff --git a/test/pdfs/issue9940.pdf b/test/pdfs/issue9940.pdf
new file mode 100644
index 000000000..4d43a2528
Binary files /dev/null and b/test/pdfs/issue9940.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index feb2f04c2..e619d3308 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -3978,5 +3978,12 @@
        "md5": "ce718efe601cd7491dd00651b4790329",
        "rounds": 1,
        "type": "eq"
+    },
+    { "id": "issue9940",
+      "file": "pdfs/issue9940.pdf",
+      "md5": "6ffef210c4b6cfe423e20430d8af168a",
+      "rounds": 1,
+      "link": false,
+      "type": "eq"
     }
 ]