diff --git a/base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/TypeCheckedTests.java b/base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/TypeCheckedTests.java
index 4770817bc9..d94cbb38c5 100644
--- a/base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/TypeCheckedTests.java
+++ b/base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/TypeCheckedTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2021 the original author or authors.
+ * Copyright 2009-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -657,6 +657,30 @@ public void testTypeChecked6240() {
         runConformTest(sources, "A1B2C3");
     }
 
+    @Test
+    public void testTypeChecked6277() {
+        //@formatter:off
+        String[] sources = {
+            "p/Main.groovy",
+            "package p\n" +
+            "@groovy.transform.TypeChecked\n" +
+            "def test(Pogo pogo) {\n" +
+            "  def x = pogo.x;\n" +
+            "  x.toLowerCase()\n" +
+            "}\n" +
+            "print test(new Pogo())\n",
+
+            "p/Pogo.groovy",
+            "package p\n" +
+            "class Pogo {\n" +
+            "  protected String getX() { 'Works' }" +
+            "}\n",
+        };
+        //@formatter:on
+
+        runConformTest(sources, "works");
+    }
+
     @Test
     public void testTypeChecked6455() {
         //@formatter:off
diff --git a/base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java b/base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
index c81e0a7717..c3efcd54e2 100644
--- a/base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
+++ b/base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
@@ -2060,11 +2060,10 @@ private static boolean hasAccessToMember(final ClassNode sender, final ClassNode
         if (Modifier.isPublic(modifiers) || sender.equals(receiver) || sender.getOuterClasses().contains(receiver)) {
             return true;
         }
-        if (Modifier.isProtected(modifiers)) {
-            return sender.isDerivedFrom(receiver);
-        } else {
-            return !Modifier.isPrivate(modifiers) && Objects.equals(sender.getPackageName(), receiver.getPackageName());
+        if (!Modifier.isPrivate(modifiers) && Objects.equals(sender.getPackageName(), receiver.getPackageName())) {
+            return true;
         }
+        return Modifier.isProtected(modifiers) && sender.isDerivedFrom(receiver);
     }
     // GRECLIPSE end
 
@@ -2221,7 +2220,7 @@ private boolean storeField(FieldNode field, boolean returnTrueIfFieldExists, Pro
         if (field == null || !returnTrueIfFieldExists) return false;
         if (visitor != null) visitor.visitField(field);
         checkOrMarkPrivateAccess(expressionToStoreOn, field, lhsOfAssignment);
-        // GRECLIPSE add
+        // GRECLIPSE add -- GROOVY-8999
         boolean accessible = hasAccessToMember(isSuperExpression(expressionToStoreOn.getObjectExpression()) ? typeCheckingContext.getEnclosingClassNode() : receiver, field.getDeclaringClass(), field.getModifiers());
         if (expressionToStoreOn instanceof AttributeExpression) {
             if (!accessible) {
diff --git a/base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java b/base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
index c8c3c32227..35fbae6932 100644
--- a/base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
+++ b/base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
@@ -1962,18 +1962,30 @@ && hasAccessToMember(enclosingTypes.iterator().next(), getter.getDeclaringClass(
         return foundGetterOrSetter;
     }
 
+    /* GRECLIPSE edit
+    private static boolean hasAccessToField(final ClassNode accessor, final FieldNode field) {
+        if (field.isPublic() || accessor.equals(field.getDeclaringClass())) {
+            return true;
+        }
+        if (field.isProtected()) {
+            return accessor.isDerivedFrom(field.getDeclaringClass());
+        } else {
+            return !field.isPrivate() && Objects.equals(accessor.getPackageName(), field.getDeclaringClass().getPackageName());
+        }
+    }
+    */
     private static boolean hasAccessToMember(final ClassNode accessor, final ClassNode receiver, final int modifiers) {
         if (Modifier.isPublic(modifiers)
                 || accessor.equals(receiver)
                 || accessor.getOuterClasses().contains(receiver)) {
             return true;
         }
-        if (Modifier.isProtected(modifiers)) {
-            return accessor.isDerivedFrom(receiver);
-        } else {
-            return !Modifier.isPrivate(modifiers) && Objects.equals(accessor.getPackageName(), receiver.getPackageName());
+        if (!Modifier.isPrivate(modifiers) && Objects.equals(accessor.getPackageName(), receiver.getPackageName())) {
+            return true;
         }
+        return Modifier.isProtected(modifiers) && accessor.isDerivedFrom(receiver);
     }
+    // GRECLIPSE end
 
     private MethodNode findGetter(final ClassNode current, String name, final boolean searchOuterClasses) {
         MethodNode getterMethod = current.getGetterMethod(name);
diff --git a/base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java b/base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
index ec1584a9ba..531cf15d6b 100644
--- a/base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
+++ b/base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingVisitor.java
@@ -1713,18 +1713,30 @@ protected boolean existsProperty(final PropertyExpression pexp, final boolean re
         return foundGetterOrSetter;
     }
 
+    /* GRECLIPSE edit
+    private static boolean hasAccessToField(final ClassNode accessor, final FieldNode field) {
+        if (field.isPublic() || accessor.equals(field.getDeclaringClass())) {
+            return true;
+        }
+        if (field.isProtected()) {
+            return accessor.isDerivedFrom(field.getDeclaringClass());
+        } else {
+            return !field.isPrivate() && Objects.equals(accessor.getPackageName(), field.getDeclaringClass().getPackageName());
+        }
+    }
+    */
     private static boolean hasAccessToMember(final ClassNode accessor, final ClassNode receiver, final int modifiers) {
         if (Modifier.isPublic(modifiers)
                 || accessor.equals(receiver)
                 || accessor.getOuterClasses().contains(receiver)) {
             return true;
         }
-        if (Modifier.isProtected(modifiers)) {
-            return accessor.isDerivedFrom(receiver);
-        } else {
-            return !Modifier.isPrivate(modifiers) && Objects.equals(accessor.getPackageName(), receiver.getPackageName());
+        if (!Modifier.isPrivate(modifiers) && Objects.equals(accessor.getPackageName(), receiver.getPackageName())) {
+            return true;
         }
+        return Modifier.isProtected(modifiers) && accessor.isDerivedFrom(receiver);
     }
+    // GRECLIPSE end
 
     private MethodNode findGetter(final ClassNode current, String name, final boolean searchOuterClasses) {
         MethodNode getterMethod = current.getGetterMethod(name);