diff --git a/src/main/java/EsperProcessor.java b/src/main/java/EsperProcessor.java
index 7e97599..747c895 100644
--- a/src/main/java/EsperProcessor.java
+++ b/src/main/java/EsperProcessor.java
@@ -83,7 +83,7 @@ public class EsperProcessor implements TickProcessor {
      * Return true if the given string is a comment.
      */
     private static boolean isComment(String str) {
-        return str.startsWith("//") || str.startsWith("--");
+        return str.matches("^\\s*//.*") || str.matches("^\\s*--.*");
     }
 
     /**