diff --git a/src/corelib/tools/qlocale_tools.cpp b/src/corelib/tools/qlocale_tools.cpp
index 4d969a4723f..a315356a23d 100644
--- a/src/corelib/tools/qlocale_tools.cpp
+++ b/src/corelib/tools/qlocale_tools.cpp
@@ -350,7 +350,7 @@ double asciiToDouble(const char *num, int numLen, bool &ok, int &processed,
         ok = false;
         for (int i = 0; i < processed; ++i) {
             char c = num[i];
-            if ((c < '0' || c > '9') && c != '.' && c != '-' && c != '+' && c != 'e') {
+            if ((c < '0' || c > '9') && c != '.' && c != '-' && c != '+' && c != 'e' && c != 'E') {
                 // Garbage found
                 processed = 0;
                 return 0.0;
diff --git a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
index b8f1cc568a5..fd37a03b8e1 100644
--- a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
+++ b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
@@ -693,6 +693,8 @@ void tst_QLocale::toReal_data()
     QTest::newRow("C 1.234e-10")       << QString("C") << QString("1.234e-10")       << true  << 1.234e-10;
     QTest::newRow("C 1.234E10")        << QString("C") << QString("1.234E10")        << true  << 1.234e10;
     QTest::newRow("C 1e10")            << QString("C") << QString("1e10")            << true  << 1.0e10;
+    QTest::newRow("C 1e310")           << QString("C") << QString("1e310")           << false << std::numeric_limits<double>::infinity();
+    QTest::newRow("C 1E310")           << QString("C") << QString("1E310")           << false << std::numeric_limits<double>::infinity();
     QTest::newRow("C  1")              << QString("C") << QString(" 1")              << true  << 1.0;
     QTest::newRow("C   1")             << QString("C") << QString("  1")             << true  << 1.0;
     QTest::newRow("C 1 ")              << QString("C") << QString("1 ")              << true  << 1.0;