diff --git a/.travis.yml b/.travis.yml
index a5a0fd789..f002fa7d2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -73,6 +73,9 @@ script:
 # check gui with qt settings
   - ${CPPCHECK} --library=qt  --error-exitcode=1  -Ilib -Iexternals/simplecpp/ -Iexternals/tinyxml/ -Icli --enable=style,performance,portability,warning,internal  --exception-handling -j 2 gui --suppressions-list=.travis_suppressions -igui/test |& tee --append /tmp/cppcheck.cppcheck
   - sh -c "! grep '^\[' /tmp/cppcheck.cppcheck"
+# check naming conventions
+  - ${CPPCHECK} --dump -q lib
+  - python addons/naming.py --private-member-variable='m[A-Z].*' lib/*.cpp.dump
 # run extra tests
   - tools/generate_and_run_more_tests.sh
 # Validate XML
diff --git a/addons/naming.py b/addons/naming.py
index 6b841bae9..512a492ce 100755
--- a/addons/naming.py
+++ b/addons/naming.py
@@ -23,7 +23,11 @@ for arg in sys.argv[1:]:
         RE_FUNCTIONNAME = arg[11:]
 
 
+FoundError = False
+
 def reportError(token, severity, msg):
+    global FoundError
+    FoundError = True
     sys.stderr.write(
         '[' + token.file + ':' + str(token.linenr) + '] (' + severity + ') naming.py: ' + msg + '\n')
 
@@ -56,3 +60,8 @@ for arg in sys.argv[1:]:
                     if not res:
                         reportError(
                             scope.bodyStart, 'style', 'Function ' + scope.className + ' violates naming convention')
+
+if FoundError:
+    print('FoundError')
+    sys.exit(1)
+