diff --git a/.travis/build-check.sh b/.travis/build-check.sh
index 250bb454..c2a4904c 100755
--- a/.travis/build-check.sh
+++ b/.travis/build-check.sh
@@ -8,7 +8,6 @@ fi
 
 if [ "${TRAVIS_OS_NAME}" = "linux" ]; then
 	export LD_LIBRARY_PATH="${PREFIX}/lib:${LD_LIBRARY_PATH:-}"
-	export CFLAGS="${CFLAGS} -Werror"
 fi
 
 if [ "${TRAVIS_OS_NAME}" = "osx"   ]; then
@@ -21,7 +20,10 @@ if [ -z ${CHOST+x} ]; then
 	./configure --with-crypto-library="${SSLLIB}" ${EXTRA_CONFIG:-} || (cat config.log && exit 1)
 	make -j$JOBS
 	src/openvpn/openvpn --version || true
-	if [ "${TRAVIS_OS_NAME}" = "linux" ]; then ldd src/openvpn/openvpn; fi
+	if [ "${TRAVIS_OS_NAME}" = "linux" ]; then
+		ldd src/openvpn/openvpn;
+		export CFLAGS="${CFLAGS:-} -Werror"
+	fi
 	if [ "${TRAVIS_OS_NAME}" = "osx" ]; then otool -L src/openvpn/openvpn; fi
 	make check
 	${EXTRA_SCRIPT:-}