diff --git a/travis/get-df-version.sh b/travis/get-df-version.sh
index 13d317d2e..24386252d 100755
--- a/travis/get-df-version.sh
+++ b/travis/get-df-version.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 cd "$(dirname "$0")"
 cd ..
-grep DF_VERSION CMakeLists.txt | perl -ne 'print "$&\n" if /[\d\.]+/'
+grep -i 'set(DF_VERSION' CMakeLists.txt | perl -ne 'print "$&\n" if /[\d\.]+/'