diff --git a/bin/compute-classpath.cmd b/bin/compute-classpath.cmd
index 9b9e40321ea93585d6faa6d4878ac43ce286d231..3cd0579aea8d3f3dbbb9e1a3edc641fa8108744b 100644
--- a/bin/compute-classpath.cmd
+++ b/bin/compute-classpath.cmd
@@ -38,7 +38,7 @@ if exist "%FWDIR%conf\spark-env.cmd" call "%FWDIR%conf\spark-env.cmd"
 rem Build up classpath
 set CLASSPATH=%SPARK_CLASSPATH%;%SPARK_SUBMIT_CLASSPATH%
 
-if "x%SPARK_CONF_DIR%"!="x" (
+if not "x%SPARK_CONF_DIR%"=="x" (
   set CLASSPATH=%CLASSPATH%;%SPARK_CONF_DIR%
 ) else (
   set CLASSPATH=%CLASSPATH%;%FWDIR%conf