diff --git a/src/main/java/com/github/fge/grappa/run/ParsingResult.java b/src/main/java/com/github/fge/grappa/run/ParsingResult.java
index d5f40390..275d709b 100644
--- a/src/main/java/com/github/fge/grappa/run/ParsingResult.java
+++ b/src/main/java/com/github/fge/grappa/run/ParsingResult.java
@@ -61,7 +61,15 @@ public ParsingResult(final boolean matched,
      */
     public boolean isSuccess()
     {
-        return matched && contextIndex == inputBuffer.length();
+        int index = contextIndex;
+        while (index < inputBuffer.length()) {
+            char c = inputBuffer.charAt(index);
+            if (c != '\n') {
+                return false; // cualquier cosa que no sea '\n' invalida el parseo completo
+            }
+            index++;
+        }
+        return matched;
     }
 
     /**