diff --git a/.travis.yml b/.travis.yml
index 3557a2f9..6364b6a2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -84,7 +84,7 @@ install:
   - sed -i 's/march=native/msse4.2/' example/Makefile
 
   - if [ ! -d build ]; then mkdir build; fi
-  - export CXX_FLAGS=""
+  - export CXX_FLAGS="-I${CHECKOUT_PATH}/include"
   - export CXX_LINKER_FLAGS=""
   - if [ -z "$BUILD_TYPE" ]; then export BUILD_TYPE=Release; fi
   - if [ "$ASAN" == "On"]; then export CXX_FLAGS="${CXX_FLAGS} -fsanitize=address,undefined,integer -fno-omit-frame-pointer -fno-sanitize=unsigned-integer-overflow"; fi
diff --git a/tests/Makefile b/tests/Makefile
index 5be7be50..0eec3271 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -1,5 +1,5 @@
 CXX	?= g++
-CXXFLAGS	=  -Wall  -pedantic -std=c++11 -pthread -O2
+CXXFLAGS	=  -Wall  -pedantic -std=c++11 -pthread -O2 -I../include
 LDPFALGS = -pthread
 
 CPP_FILES := $(wildcard *.cpp)