diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp
index 218e8b959cd..8a1fda6ccbe 100644
--- a/src/corelib/io/qprocess.cpp
+++ b/src/corelib/io/qprocess.cpp
@@ -264,11 +264,16 @@ bool QProcessEnvironment::operator==(const QProcessEnvironment &other) const
 {
     if (d == other.d)
         return true;
-    if (d && other.d) {
-        QProcessEnvironmentPrivate::OrderedMutexLocker locker(d, other.d);
-        return d->hash == other.d->hash;
+    if (d) {
+        if (other.d) {
+            QProcessEnvironmentPrivate::OrderedMutexLocker locker(d, other.d);
+            return d->hash == other.d->hash;
+        } else {
+            return isEmpty();
+        }
+    } else {
+        return other.isEmpty();
     }
-    return false;
 }
 
 /*!
diff --git a/tests/auto/corelib/io/qprocessenvironment/tst_qprocessenvironment.cpp b/tests/auto/corelib/io/qprocessenvironment/tst_qprocessenvironment.cpp
index fb64a48362e..2099101a91a 100644
--- a/tests/auto/corelib/io/qprocessenvironment/tst_qprocessenvironment.cpp
+++ b/tests/auto/corelib/io/qprocessenvironment/tst_qprocessenvironment.cpp
@@ -66,11 +66,19 @@ void tst_QProcessEnvironment::operator_eq()
     QVERIFY(e1 == e2);
 
     e1.clear();
-    QVERIFY(e1 != e2);
+    QVERIFY(e1 == e2);
 
     e2.clear();
-
     QVERIFY(e1 == e2);
+
+    e1.insert("FOO", "bar");
+    QVERIFY(e1 != e2);
+
+    e2.insert("FOO", "bar");
+    QVERIFY(e1 == e2);
+
+    e2.insert("FOO", "baz");
+    QVERIFY(e1 != e2);
 }
 
 void tst_QProcessEnvironment::clearAndIsEmpty()