diff --git a/initrd_hooks/lipnsa.hook.sh b/initrd_hooks/lipnsa.hook.sh
index 2760be628c63b79c489edb2ed1c5dedd946964bd..b5714d768974fcf880d7c3851009f3e38dad8141 100644
--- a/initrd_hooks/lipnsa.hook.sh
+++ b/initrd_hooks/lipnsa.hook.sh
@@ -7,7 +7,7 @@ LOGFUNCTIONSSOURCE="/scripts/casper-functions"
 TARGET="/root"
 
 if [ -e "${LOGFUNCTIONSSOURCE}" ]; then
-  source ${LOGFUNCTIONSSOURCE}
+  . ${LOGFUNCTIONSSOURCE}
 else
   echo "Warning: ${LOGFUNCTIONSSOURCE} does not exist. Cannot source casper functions!"
 fi