diff --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
@@ -24,6 +24,7 @@
       hasGlobalStorage(),
       unless(anyOf(
           isLocalVarDecl(), isConstexpr(), hasType(isConstQualified()),
+          isPrivate(), isProtected(),
           hasType(referenceType())))); // References can't be changed, only the
                                        // data they reference can be changed.
 
diff --git a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-non-const-global-variables.cpp b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-non-const-global-variables.cpp
--- a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-non-const-global-variables.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-non-const-global-variables.cpp
@@ -228,6 +228,20 @@
 template <class T>
 constexpr T templateVariable = T(0L);
 
+// CHECKING FOR NON-CONST STATIC PRIVATE/PROTECTED CLASS MEMBERS //////////////
+class Foo {
+  static int nonConstStaticPrivateMember;
+protected:
+  static int nonConstStaticProtectedMember;
+};
+
+struct Bar {
+private:
+  static int nonConstStaticPrivateMember;
+protected:
+  static int nonConstStaticProtectedMember;
+};
+
 // CHECKING AGAINST FALSE POSITIVES INSIDE FUNCTION SCOPE /////////////////////
 int main() {
   for (int i = 0; i < 3; ++i) {