diff --git a/.travis.yml b/.travis.yml
index db20b4a..8e83b48 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,7 @@ before_install:
 before_script:
     # Print build info.
     - echo $TRAVIS_COMMIT
+    - echo $TRAVIS_BRANCH
     - echo $TRAVIS_TAG
     - echo $TRAVIS_BRANCH
     - echo $TRAVIS_BUILD_NUMBER
diff --git a/check_signed_off.sh b/check_signed_off.sh
index ea67e11..524dbea 100755
--- a/check_signed_off.sh
+++ b/check_signed_off.sh
@@ -12,9 +12,9 @@ esac
 if [ -n "$1" ]
 then
     COMMIT_RANGE="$1"
-elif [ -n "$TRAVIS_COMMIT_RANGE" ]
+elif [ -n "$TRAVIS_BRANCH" ]
 then
-    COMMIT_RANGE="$TRAVIS_COMMIT_RANGE"
+    COMMIT_RANGE="$TRAVIS_BRANCH..FETCH_HEAD"
 else
     # Just check previous commit if nothing else is specified.
     COMMIT_RANGE=HEAD~1..HEAD