diff --git a/src/core/jbig2.js b/src/core/jbig2.js
index cc9446dc2..8e72ff370 100644
--- a/src/core/jbig2.js
+++ b/src/core/jbig2.js
@@ -394,8 +394,8 @@ var Jbig2Image = (function Jbig2ImageClosure() {
           }
         }
         for (k = 0; k < referenceTemplateLength; k++) {
-          i0 = i + referenceTemplateY[k] + offsetY;
-          j0 = j + referenceTemplateX[k] + offsetX;
+          i0 = i + referenceTemplateY[k] - offsetY;
+          j0 = j + referenceTemplateX[k] - offsetX;
           if (i0 < 0 || i0 >= referenceHeight || j0 < 0 ||
               j0 >= referenceWidth) {
             contextLabel <<= 1; // out of bound pixel
diff --git a/test/pdfs/issue7308.pdf.link b/test/pdfs/issue7308.pdf.link
new file mode 100644
index 000000000..fede60217
--- /dev/null
+++ b/test/pdfs/issue7308.pdf.link
@@ -0,0 +1 @@
+https://github.com/mozilla/pdf.js/files/256692/ZGTA198001028.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index b131da1a2..c997c0b31 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -2322,6 +2322,13 @@
       "link": true,
       "type": "eq"
     },
+    {  "id": "issue7308",
+       "file": "pdfs/issue7308.pdf",
+       "md5": "ba2e23d3af93ac2c634d77ccbe2e79d5",
+       "rounds": 1,
+       "link": true,
+       "type": "eq"
+    },
     {  "id": "issue1597",
       "file": "pdfs/issue1597.pdf",
       "md5": "a5ebef467fd6e2fc0aeb56c9eb725ae3",