diff --git a/src/corelib/serialization/qdatastream.h b/src/corelib/serialization/qdatastream.h
index da99948dde7..1dad3badb77 100644
--- a/src/corelib/serialization/qdatastream.h
+++ b/src/corelib/serialization/qdatastream.h
@@ -90,7 +90,7 @@ public:
         Qt_6_7 = 22,
         Qt_6_8 = Qt_6_7,
         Qt_6_9 = Qt_6_7,
-        Qt_6_10 = Qt_6_7,
+        Qt_6_10 = 23,
         Qt_DefaultCompiledVersion = Qt_6_10
 #if QT_VERSION >= QT_VERSION_CHECK(6, 11, 0)
 #error Add the datastream version for this Qt version and update Qt_DefaultCompiledVersion
diff --git a/tests/auto/corelib/serialization/qdatastream/tst_qdatastream.cpp b/tests/auto/corelib/serialization/qdatastream/tst_qdatastream.cpp
index 461fded8aa5..c8fb5f25f70 100644
--- a/tests/auto/corelib/serialization/qdatastream/tst_qdatastream.cpp
+++ b/tests/auto/corelib/serialization/qdatastream/tst_qdatastream.cpp
@@ -300,6 +300,7 @@ static constexpr int NColorRoles[] = {
     QPalette::PlaceholderText + 1, // Qt_6_0
     QPalette::Accent + 1,     // Qt_6_6
     QPalette::Accent + 1,     // Qt_6_7
+    QPalette::Accent + 1,     // Qt_6_10
 };
 
 // +1, because we start from "No Version"