diff --git a/python/python-psi-impl/src/com/jetbrains/python/inspections/PyTypeCheckerInspection.java b/python/python-psi-impl/src/com/jetbrains/python/inspections/PyTypeCheckerInspection.java
index 51c329f73693..6fc7ddb172c7 100644
--- a/python/python-psi-impl/src/com/jetbrains/python/inspections/PyTypeCheckerInspection.java
+++ b/python/python-psi-impl/src/com/jetbrains/python/inspections/PyTypeCheckerInspection.java
@@ -267,7 +267,9 @@ public class PyTypeCheckerInspection extends PyInspection {
     }
 
     private static boolean requiresTypeSpecialization(@Nullable PyType type) {
-      if (type instanceof PyTypeParameterType && !(type instanceof PySelfType)) return true;
+      if (type instanceof PyTypeParameterType typeParameterType &&
+          typeParameterType.getDefaultType() == null &&
+          !(type instanceof PySelfType)) return true;
       return type instanceof PyCollectionType collectionType &&
              exists(collectionType.getElementTypes(), Visitor::requiresTypeSpecialization);
     }
diff --git a/python/testSrc/com/jetbrains/python/inspections/Py3TypeCheckerInspectionTest.java b/python/testSrc/com/jetbrains/python/inspections/Py3TypeCheckerInspectionTest.java
index c352d3bc5543..c7015d498348 100644
--- a/python/testSrc/com/jetbrains/python/inspections/Py3TypeCheckerInspectionTest.java
+++ b/python/testSrc/com/jetbrains/python/inspections/Py3TypeCheckerInspectionTest.java
@@ -2994,4 +2994,17 @@ def foo(param: str | int) -> TypeGuard[str]:
                    v5: Hashable = DC5(0)
                    """);
   }
+
+  // PY-76855
+  public void testAccessToAttributeOfGenericClassWithDefaultIsNotAmbiguous() {
+    doTestByText("""
+                   class Test1[T = int]():
+                       attr: T
+                   class Test2[T]():
+                       attr: T
+                   
+                   Test1.attr #OK
+                   Test2.<warning descr="Access to generic instance variables via class is ambiguous">attr</warning>
+                   """);
+  }
 }