diff --git a/.travis/script-linux.sh b/.travis/script-linux.sh
index a9909bfd..7d6a524b 100755
--- a/.travis/script-linux.sh
+++ b/.travis/script-linux.sh
@@ -13,7 +13,7 @@ make
 
 echo "==============> No namespace build"
 make clean >/dev/null
-make CXXFLAGS="${_FLAGS} -DDONT_SET_USING_DISTRHO_NAMESPACE"
+make CXXFLAGS="${_FLAGS} -DDONT_SET_USING_DISTRHO_NAMESPACE -DDONT_SET_USING_DGL_NAMESPACE"
 
 echo "==============> Custom namespace build"
 make clean >/dev/null