diff --git a/.travis.yml b/.travis.yml
index 8c03b0d..fe517ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,8 +18,8 @@ script:
 env:
  - BRBASE=3.16
  - BRBASE=3.16 CMPLR=clang
- - BRBASE=3.16 USR_CXXFLAGS=-std=c++11
- - BRBASE=3.16 USR_CXXFLAGS=-std=c++11 CMPLR=clang
+ - BRBASE=3.16 EXTRA="CMD_CXXFLAGS=-std=c++11"
+ - BRBASE=3.16 EXTRA="CMD_CXXFLAGS=-std=c++11" CMPLR=clang
  - BRBASE=3.16 WINE=32 TEST=NO STATIC=YES
  - BRBASE=3.16 WINE=32 TEST=NO STATIC=NO
  - BRBASE=3.15
diff --git a/ci/travis-build.sh b/ci/travis-build.sh
index 36c49cf..a022471 100755
--- a/ci/travis-build.sh
+++ b/ci/travis-build.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 set -e -x
 
-make -j2
+make -j2 $EXTRA
 
 if [ "$TEST" != "NO" ]
 then
diff --git a/ci/travis-prepare.sh b/ci/travis-prepare.sh
index 787d55d..a427d71 100755
--- a/ci/travis-prepare.sh
+++ b/ci/travis-prepare.sh
@@ -62,4 +62,4 @@ USR_CFLAGS += $USR_CFLAGS
 USR_CXXFLAGS += $USR_CXXFLAGS
 EOF
 
-make -j2 -C epics-base
+make -j2 -C epics-base $EXTRA