diff --git a/lib/checkunusedvar.cpp b/lib/checkunusedvar.cpp
index 5ef468af7..5e2bc390f 100644
--- a/lib/checkunusedvar.cpp
+++ b/lib/checkunusedvar.cpp
@@ -694,7 +694,7 @@ void CheckUnusedVar::checkFunctionVariableUsage_iterateScopes(const Scope* const
                      i->typeEndToken()->isStandardType() ||
                      isRecordTypeWithoutSideEffects(i->type()) ||
                      (i->isStlType() &&
-                      !Token::Match(i->typeStartToken()->tokAt(2), "lock_guard|unique_lock|shared_ptr|unique_ptr|auto_ptr")))
+                      !Token::Match(i->typeStartToken()->tokAt(2), "lock_guard|unique_lock|shared_ptr|unique_ptr|auto_ptr|shared_lock")))
                 type = Variables::standard;
             if (type == Variables::none || isPartOfClassStructUnion(i->typeStartToken()))
                 continue;
diff --git a/test/testunusedvar.cpp b/test/testunusedvar.cpp
index 2b8ee0a7a..7eeafa8bf 100644
--- a/test/testunusedvar.cpp
+++ b/test/testunusedvar.cpp
@@ -1870,7 +1870,7 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
-    void localvar46() { // #5491/#5494
+    void localvar46() { // #5491/#5494/#6301
         functionVariableUsage("int func() {\n"
                               "    int i = 0;\n"
                               "    int j{i};\n"
@@ -1884,6 +1884,11 @@ private:
                               "    return 0;\n"
                               "}");
         ASSERT_EQUALS("", errout.str());
+
+        functionVariableUsage("int func() {\n"
+                              "    std::shared_lock<std::shared_timed_mutex> lock( m );\n"
+                              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void localvaralias1() {