3 files changed, 8 insertions, 4 deletions
diff --git a/NEWS b/NEWS
index b4eb2ad..9f6fe81 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+# 1.4.21
+
+* Ignore w:u elements when w:val is missing.
+
 # 1.4.20
 
 * Emit warning instead of throwing exception when image file cannot be found for
diff --git a/lib/docx/body-reader.js b/lib/docx/body-reader.js
index 4bd38a9..61b198b 100644
--- a/lib/docx/body-reader.js
+++ b/lib/docx/body-reader.js
@@ -83,7 +83,7 @@ function BodyReader(options) {
     function readUnderline(element) {
         if (element) {
             var value = element.attributes["w:val"];
-            return value !== "false" && value !== "0" && value !== "none";
+            return value !== undefined && value !== "false" && value !== "0" && value !== "none";
         } else {
             return false;
         }
diff --git a/test/docx/body-reader.tests.js b/test/docx/body-reader.tests.js
index 2e53200..f5c8b87 100644
--- a/test/docx/body-reader.tests.js
+++ b/test/docx/body-reader.tests.js
@@ -512,11 +512,11 @@ test("isUnderline is false if underline element is not present", function() {
     assert.deepEqual(run.isUnderline, false);
 });
 
-test("isUnderline is true if underline element is present without w:val attribute", function() {
+test("isUnderline is false if underline element is present without w:val attribute", function() {
     var underlineXml = new XmlElement("w:u");
     var runXml = runWithProperties([underlineXml]);
     var run = readXmlElementValue(runXml);
-    assert.equal(run.isUnderline, true);
+    assert.equal(run.isUnderline, false);
 });
 
 test("isUnderline is false if underline element is present and w:val is false", function() {
@@ -540,7 +540,7 @@ test("isUnderline is false if underline element is present and w:val is none", f
     assert.equal(run.isUnderline, false);
 });
 
-test("isUnderline is false if underline element is present and w:val is not none or falsy", function() {
+test("isUnderline is true if underline element is present and w:val is not none or falsy", function() {
     var underlineXml = new XmlElement("w:u", {"w:val": "single"});
     var runXml = runWithProperties([underlineXml]);
     var run = readXmlElementValue(runXml);