diff --git a/dist/changes-5.0.0 b/dist/changes-5.0.0
index 4c226aa9d6..344edb6517 100644
--- a/dist/changes-5.0.0
+++ b/dist/changes-5.0.0
@@ -38,6 +38,8 @@ Third party components
 
 QtCore
 ------
+* drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
+  value is returned for an unassigned codepoints now.
 
 QtGui
 -----
diff --git a/examples/widgets/charactermap/characterwidget.cpp b/examples/widgets/charactermap/characterwidget.cpp
index d9a59b68b2..7d515f4f38 100644
--- a/examples/widgets/charactermap/characterwidget.cpp
+++ b/examples/widgets/charactermap/characterwidget.cpp
@@ -120,7 +120,7 @@ void CharacterWidget::mousePressEvent(QMouseEvent *event)
 {
     if (event->button() == Qt::LeftButton) {
         lastKey = (event->y()/squareSize)*columns + event->x()/squareSize;
-        if (QChar(lastKey).category() != QChar::NoCategory)
+        if (QChar(lastKey).category() != QChar::Other_NotAssigned)
             emit characterSelected(QString(QChar(lastKey)));
         update();
     }
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-external.h b/src/3rdparty/harfbuzz/src/harfbuzz-external.h
index 7644f0dd43..5fff35fe50 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-external.h
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-external.h
@@ -52,8 +52,6 @@ typedef enum {
 
 typedef enum 
 {
-    HB_NoCategory,
-
     HB_Mark_NonSpacing,          /*   Mn */
     HB_Mark_SpacingCombining,    /*   Mc */
     HB_Mark_Enclosing,           /*   Me */
diff --git a/src/corelib/tools/qchar.cpp b/src/corelib/tools/qchar.cpp
index 475bd55de4..89f19b40e6 100644
--- a/src/corelib/tools/qchar.cpp
+++ b/src/corelib/tools/qchar.cpp
@@ -259,8 +259,6 @@ QT_BEGIN_NAMESPACE
 
     \value Symbol_Other  Unicode class name So
 
-    \value NoCategory  Qt cannot find an appropriate category for the character.
-
     \omitvalue Punctuation_Dask
 
     \sa category()
@@ -764,7 +762,7 @@ QChar::Category QChar::category() const
 QChar::Category QChar::category(uint ucs4)
 {
     if (ucs4 > UNICODE_LAST_CODEPOINT)
-        return QChar::NoCategory;
+        return QChar::Other_NotAssigned;
     return (QChar::Category) qGetProp(ucs4)->category;
 }
 
diff --git a/src/corelib/tools/qchar.h b/src/corelib/tools/qchar.h
index d6db72d5ac..277c2987ce 100644
--- a/src/corelib/tools/qchar.h
+++ b/src/corelib/tools/qchar.h
@@ -93,8 +93,6 @@ public:
 
     enum Category
     {
-        NoCategory,    // ### Qt 5: replace with Other_NotAssigned
-
         Mark_NonSpacing,          //   Mn
         Mark_SpacingCombining,    //   Mc
         Mark_Enclosing,           //   Me
diff --git a/tests/auto/qchar/tst_qchar.cpp b/tests/auto/qchar/tst_qchar.cpp
index 1fdbc34eb9..02807f38b3 100644
--- a/tests/auto/qchar/tst_qchar.cpp
+++ b/tests/auto/qchar/tst_qchar.cpp
@@ -289,11 +289,10 @@ void tst_QChar::category()
     QVERIFY(QChar::category(0xdc00u) == QChar::Other_Surrogate);
     QVERIFY(QChar::category(0xdc01u) == QChar::Other_Surrogate);
 
-    QVERIFY(QChar::category((uint)0x10fffdu) == QChar::Other_PrivateUse);
-    QVERIFY(QChar::category((uint)0x110000u) == QChar::NoCategory);
-
     QVERIFY(QChar::category((uint)0x1aff) == QChar::Other_NotAssigned);
+    QVERIFY(QChar::category((uint)0x10fffdu) == QChar::Other_PrivateUse);
     QVERIFY(QChar::category((uint)0x10ffffu) == QChar::Other_NotAssigned);
+    QVERIFY(QChar::category((uint)0x110000u) == QChar::Other_NotAssigned);
 }
 
 void tst_QChar::direction()
diff --git a/util/unicode/main.cpp b/util/unicode/main.cpp
index 4d43464455..e2596c799f 100644
--- a/util/unicode/main.cpp
+++ b/util/unicode/main.cpp
@@ -615,7 +615,7 @@ static void initCategoryMap()
         { QChar::Symbol_Currency,          "Sc" },
         { QChar::Symbol_Modifier,          "Sk" },
         { QChar::Symbol_Other,             "So" },
-        { QChar::NoCategory, 0 }
+        { QChar::Other_NotAssigned, 0 }
     };
     Cat *c = categories;
     while (c->name) {
@@ -763,10 +763,7 @@ static void readUnicodeData()
         }
 
         UnicodeData data(codepoint);
-        data.p.category = categoryMap.value(properties[UD_Category], QChar::NoCategory);
-        if (data.p.category == QChar::NoCategory)
-            qFatal("unassigned char category: %s", properties[UD_Category].constData());
-
+        data.p.category = categoryMap.value(properties[UD_Category], QChar::Other_NotAssigned);
         data.p.combiningClass = properties[UD_CombiningClass].toInt();
         if (!combiningClassUsage.contains(data.p.combiningClass))
             combiningClassUsage[data.p.combiningClass] = 1;