diff --git a/src/tools/moc/moc.cpp b/src/tools/moc/moc.cpp
index 89bf2bd6a12..03f022da695 100644
--- a/src/tools/moc/moc.cpp
+++ b/src/tools/moc/moc.cpp
@@ -197,6 +197,7 @@ Type Moc::parseType()
                 prev();
                 break;
             }
+            Q_FALLTHROUGH();
         case CHAR:
         case SHORT:
         case INT:
diff --git a/src/tools/moc/parser.h b/src/tools/moc/parser.h
index ee8761108b9..bedcbbf7e26 100644
--- a/src/tools/moc/parser.h
+++ b/src/tools/moc/parser.h
@@ -68,8 +68,8 @@ public:
     inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}
     inline const Symbol &symbol() { return symbols.at(index-1);}
 
-    void error(int rollback);
-    void error(const char *msg = 0);
+    Q_NORETURN void error(int rollback);
+    Q_NORETURN void error(const char *msg = 0);
     void warning(const char * = 0);
     void note(const char * = 0);