diff --git a/ci_scripts/run-doxygen.sh b/ci_scripts/run-doxygen.sh
index 190b27dae..7ef349d4b 100755
--- a/ci_scripts/run-doxygen.sh
+++ b/ci_scripts/run-doxygen.sh
@@ -3,4 +3,4 @@
 set -ex
 
 cd deltachat-ffi 
-PROJECT_NUMBER=$(git log -1 --format "%h (%cd)") doxygen 
+PROJECT_NUMBER=$(git log -1 --format="%h (%cd)") doxygen