diff --git a/scripts/travis-common.sh b/scripts/travis-common.sh
index fc5cca4ada..6ff72639f7 100644
--- a/scripts/travis-common.sh
+++ b/scripts/travis-common.sh
@@ -82,7 +82,7 @@ config_override () {
 configure () {
     if enabled ${COVERAGE}; then
         ./configure "$@" PGSQL2SQLITE=False SVG2PNG=False SVG_RENDERER=False \
-            COVERAGE=True DEBUG=True
+            COVERAGE=True DEBUG=True WARNING_CXXFLAGS="-Wno-unknown-warning-option"
     elif enabled ${MASON_PUBLISH}; then
         export MASON_NAME=mapnik
         export MASON_VERSION=latest
@@ -90,9 +90,9 @@ configure () {
         source ./.mason/mason.sh
         ./configure "$@" PREFIX=${MASON_PREFIX} \
             PATH_REPLACE='' MAPNIK_BUNDLED_SHARE_DIRECTORY=True \
-            RUNTIME_LINK='static'
+            RUNTIME_LINK='static' WARNING_CXXFLAGS="-Wno-unknown-warning-option"
     else
-        ./configure "$@"
+        ./configure "$@" WARNING_CXXFLAGS="-Wno-unknown-warning-option"
     fi
     # print final config values, sorted and indented
     sort -sk1,1 ./config.py | sed -e 's/^/	/'