diff --git a/.travis.yml b/.travis.yml
index e71145bf..5c287abd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,6 @@ script:
   - if [ "$TRAVIS_OS_NAME" == "linux" ]; then sudo apt-get install libgtk-3-dev -y || sudo apt-cache search libgtk3; fi
   - mkdir build
   - cd build
-  - cmake --version
   - cmake .. -G "Unix Makefiles"
   - make tester examples
   - rm -rf *
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c64e2af..3c081290 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,8 +99,8 @@ else()
 		-fvisibility=hidden
 	)
 	# don't use C_VERSION or CXX_VERSION because they use GNU standards
-	string(APPEND CMAKE_C_FLAGS " --std=c99")
-	string(APPEND CMAKE_CXX_FLAGS " --std=c++11")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --std=c99")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11")
 
 	set(_COMMON_LDFLAGS
 		-fvisibility=hidden