diff --git a/.drone.yml b/.drone.yml
index 1d6789c4f..bbf1597d1 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,7 +15,7 @@ steps:
 
   commands:
   - export DEBIAN_FRONTEND=noninteractive
-  - export CI_BRANCH=$DRONE_SOURCE_BRANCH
+  - export TRAVIS_BRANCH=$DRONE_SOURCE_BRANCH
   - apt-get -y update
   - apt-get -y install libboost-all-dev doxygen mkdocs graphviz zlib1g-dev gcc clang make cmake python3 python3-pip git
   - pip3 install mkdocs-material cpp-coveralls pyyaml
@@ -104,7 +104,7 @@ steps:
   - export DRONE_BUILD_DIR=$PWD
   - export DEBIAN_FRONTEND=noninteractive
   - export DOXYFILE=$DRONE_BUILD_DIR/Doxyfile
-  - export CI_BRANCH=$DRONE_REPO_BRANCH
+  - export TRAVIS_BRANCH=$DRONE_REPO_BRANCH
   - apt-get -y update
   - apt-get -y install libboost-all-dev doxygen mkdocs graphviz zlib1g-dev gcc clang make cmake python3 python3-pip git
   - pip3 install mkdocs-material cpp-coveralls pyyaml