diff --git a/frameworks/common-functions.sh b/frameworks/common-functions.sh
index 70baeb7b794c3d0e93b1410ca4c17602dd6ae9b3..9fc3bc4c2e57a66056bda5a705dab6a91a51cd6d 100644
--- a/frameworks/common-functions.sh
+++ b/frameworks/common-functions.sh
@@ -89,7 +89,7 @@ function startZipkin {
 		cd zipkin
 	fi
 	java -Xmx6g -jar zipkin.jar &> zipkin.txt &
-	pid=$1
+	pid=$!
 	sleep 5
 	cd ..
 }