diff --git a/lib/checkunusedvar.cpp b/lib/checkunusedvar.cpp
index 6c8cf11c4..3ce156553 100644
--- a/lib/checkunusedvar.cpp
+++ b/lib/checkunusedvar.cpp
@@ -1038,7 +1038,8 @@ void CheckUnusedVar::checkFunctionVariableUsage_iterateScopes(const Scope* const
                     else
                         variables.write(varid1, tok);
                 } else if (varid1 && Token::Match(tok, "%varid% .", varid1)) {
-                    variables.use(varid1, tok);
+                    variables.read(varid1, tok);
+                    variables.write(varid1, start);
                 } else if (var &&
                            var->_type == Variables::pointer &&
                            Token::Match(tok, "%name% ;") &&
diff --git a/test/testunusedvar.cpp b/test/testunusedvar.cpp
index 55640e010..d4e202164 100644
--- a/test/testunusedvar.cpp
+++ b/test/testunusedvar.cpp
@@ -103,6 +103,7 @@ private:
         TEST_CASE(localvar48); // ticket #6954
         TEST_CASE(localvar49); // ticket #7594
         TEST_CASE(localvar50); // ticket #6261 : dostuff(cond ? buf1 : buf2)
+        TEST_CASE(localvar51); // ticket #8128 - FN : tok = tok->next();
         TEST_CASE(localvaralias1);
         TEST_CASE(localvaralias2); // ticket #1637
         TEST_CASE(localvaralias3); // ticket #1639
@@ -2044,6 +2045,21 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void localvar51() { // #8128 FN
+        functionVariableUsage("void foo() {\n"
+                              "  const char *tok = var->nameToken();\n"
+                              "  tok = tok->next();\n"  // read+write
+                              "}");
+        ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'tok' is assigned a value that is never used.\n", errout.str());
+
+        // TODO: False negative
+        functionVariableUsage("void foo() {\n"
+                              "  int x = 4;\n"
+                              "  x = 15 + x;\n"  // read+write
+                              "}");
+        TODO_ASSERT_EQUALS("error", "", errout.str());
+	}
+
     void localvaralias1() {
         functionVariableUsage("void foo()\n"
                               "{\n"