diff --git a/bin/interpreter.sh b/bin/interpreter.sh
index 524e784b044..dfa4a4290db 100755
--- a/bin/interpreter.sh
+++ b/bin/interpreter.sh
@@ -76,7 +76,7 @@ fi
 if [[ x"" == x${PYTHONPATH} ]]; then
   export PYTHONPATH="${ZEPPELIN_HOME}/python/lib/pyspark.zip:${ZEPPELIN_HOME}/python/lib/py4j-0.8.2.1-src.zip"
 else
-  export PYTHONPATH="$PYTHONPATH${ZEPPELIN_HOME}/lib/pyspark.zip:${ZEPPELIN_HOME}/python/lib/py4j-0.8.2.1-src.zip"
+  export PYTHONPATH="$PYTHONPATH$:{ZEPPELIN_HOME}/lib/pyspark.zip:${ZEPPELIN_HOME}/python/lib/py4j-0.8.2.1-src.zip"
 fi
 
 if [[ x"" == x${SPARK_HOME} ]]; then