diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 4969542f88f..815040df91e 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -8054,6 +8054,17 @@ void Tokenizer::reportUnknownMacros() const
         }
     }
 
+    // Report unknown macros before } "{ .. if (x) MACRO }"
+    for (const Token *tok = tokens(); tok; tok = tok->next()) {
+        if (Token::Match(tok, ")|; %name% }")) {
+            const Token* prev = tok->linkAt(2);
+            while (Token::simpleMatch(prev, "{"))
+                prev = prev->previous();
+            if (Token::Match(prev, ";|)"))
+                unknownMacroError(tok->next());
+        }
+    }
+
     // Report unknown macros that contain several statements "MACRO(a;b;c)"
     for (const Token *tok = tokens(); tok; tok = tok->next()) {
         if (!Token::Match(tok, "%name% ("))
diff --git a/test/testclass.cpp b/test/testclass.cpp
index 85f0c7f0a3e..995e343835d 100644
--- a/test/testclass.cpp
+++ b/test/testclass.cpp
@@ -8440,6 +8440,15 @@ class TestClass : public TestFixture {
                              "    void g() { f(); }\n"
                              "};");
         ASSERT_EQUALS("", errout.str());
+
+        checkUselessOverride("struct B { virtual void f(); };\n" // #11808
+                             "struct D : B { void f() override {} };\n"
+                             "struct D2 : D {\n"
+                             "    void f() override {\n"
+                             "        B::f();\n"
+                             "    }\n"
+                             "};");
+        ASSERT_EQUALS("", errout.str());
     }
 
 #define checkUnsafeClassRefMember(code) checkUnsafeClassRefMember_(code, __FILE__, __LINE__)
diff --git a/test/testtokenize.cpp b/test/testtokenize.cpp
index 2a5055a7a90..266224c0e29 100644
--- a/test/testtokenize.cpp
+++ b/test/testtokenize.cpp
@@ -6843,6 +6843,9 @@ class TestTokenizer : public TestFixture {
         ASSERT_NO_THROW(tokenizeAndStringify(code11));
 
         ASSERT_NO_THROW(tokenizeAndStringify("alignas(8) alignas(16) int x;")); // alignas is not unknown macro
+
+        ASSERT_THROW(tokenizeAndStringify("void foo() { if(x) SYSTEM_ERROR }"), InternalError);
+        ASSERT_THROW(tokenizeAndStringify("void foo() { dostuff(); SYSTEM_ERROR }"), InternalError);
     }
 
     void findGarbageCode() { // Test Tokenizer::findGarbageCode()