diff --git a/src/core/fonts.js b/src/core/fonts.js
index febbf21c7..d72ed61e8 100644
--- a/src/core/fonts.js
+++ b/src/core/fonts.js
@@ -1613,7 +1613,19 @@ var Font = (function FontClosure() {
         }
 
         font.pos = (font.start ? font.start : 0) + header.offset;
-        font.pos += header.length - 2;
+        font.pos += 4; // version
+        font.pos += 2; // ascent
+        font.pos += 2; // descent
+        font.pos += 2; // linegap
+        font.pos += 2; // adv_width_max
+        font.pos += 2; // min_sb1
+        font.pos += 2; // min_sb2
+        font.pos += 2; // max_extent
+        font.pos += 2; // caret_slope_rise
+        font.pos += 2; // caret_slope_run
+        font.pos += 2; // caret_offset
+        font.pos += 8; // reserved
+        font.pos += 2; // format
         var numOfMetrics = font.getUint16();
 
         if (numOfMetrics > numGlyphs) {
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 152b463af..58c294e31 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -125,6 +125,7 @@
 !issue6541.pdf
 !issue2948.pdf
 !issue6231_1.pdf
+!issue10402.pdf
 !issue7074_reduced.pdf
 !issue6413.pdf
 !issue4630.pdf
diff --git a/test/pdfs/issue10402.pdf b/test/pdfs/issue10402.pdf
new file mode 100644
index 000000000..f03c3a404
Binary files /dev/null and b/test/pdfs/issue10402.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 4c78bfcd9..e88746345 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -3429,6 +3429,12 @@
       "type": "eq",
       "about": "True type font with encoding dict with no base encoding but with differences."
     },
+    {  "id": "issue10402",
+       "file": "pdfs/issue10402.pdf",
+       "md5": "7936bd34d7c0aebd0a864b5aa98aa1b4",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue3064-text",
        "file": "pdfs/issue3064.pdf",
        "md5": "0307415b7d69b13acaf8bd4285d9544b",