diff --git a/.travis.yml b/.travis.yml
index c7b6de79a..3df4e5b43 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -209,9 +209,9 @@ script:
   - make -s test -j2 CPPFLAGS=-DTEST_MATHLIB_VALUE
   - touch lib/mathlib.cpp test/testmathlib.cpp
 # compile cppcheck with -DNONNEG
-  - echo $CXXFLAGS
-  - make -s CPPFLAGS=-DNONNEG -j2
-  - make clean
+#  - echo $CXXFLAGS
+#  - make -s CPPFLAGS=-DNONNEG -j2
+#  - make clean
 # compile cppcheck, default build
   - echo $CXXFLAGS
   - make -s test -j2