diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index fa4c1e97669..d86a15fbfa6 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -1015,7 +1015,7 @@ Handle<Value> Connection::EncIn(const Arguments& args) {
   size_t len = args[2]->Int32Value();
   if (off + len > buffer_length) {
     return ThrowException(Exception::Error(
-          String::New("Length is extends beyond buffer")));
+          String::New("off + len > buffer.length")));
   }
 
   int bytes_written = BIO_write(ss->bio_read_, buffer_data + off, len);
@@ -1054,7 +1054,7 @@ Handle<Value> Connection::ClearOut(const Arguments& args) {
   size_t len = args[2]->Int32Value();
   if (off + len > buffer_length) {
     return ThrowException(Exception::Error(
-          String::New("Length is extends beyond buffer")));
+          String::New("off + len > buffer.length")));
   }
 
   if (!SSL_is_init_finished(ss->ssl_)) {
@@ -1127,7 +1127,7 @@ Handle<Value> Connection::EncOut(const Arguments& args) {
   size_t len = args[2]->Int32Value();
   if (off + len > buffer_length) {
     return ThrowException(Exception::Error(
-          String::New("Length is extends beyond buffer")));
+          String::New("off + len > buffer.length")));
   }
 
   int bytes_read = BIO_read(ss->bio_write_, buffer_data + off, len);
@@ -1167,7 +1167,7 @@ Handle<Value> Connection::ClearIn(const Arguments& args) {
   size_t len = args[2]->Int32Value();
   if (off + len > buffer_length) {
     return ThrowException(Exception::Error(
-          String::New("Length is extends beyond buffer")));
+          String::New("off + len > buffer.length")));
   }
 
   if (!SSL_is_init_finished(ss->ssl_)) {
diff --git a/src/node_file.cc b/src/node_file.cc
index 6febc5768bc..60c094b243a 100644
--- a/src/node_file.cc
+++ b/src/node_file.cc
@@ -730,7 +730,7 @@ static Handle<Value> Write(const Arguments& args) {
   ssize_t len = args[3]->Int32Value();
   if (off + len > buffer_length) {
     return ThrowException(Exception::Error(
-          String::New("Length is extends beyond buffer")));
+          String::New("off + len > buffer.length")));
   }
 
   ASSERT_OFFSET(args[4]);
diff --git a/src/node_http_parser.cc b/src/node_http_parser.cc
index a6c77bca16f..82cb9aa8ae9 100644
--- a/src/node_http_parser.cc
+++ b/src/node_http_parser.cc
@@ -406,7 +406,7 @@ public:
     size_t len = args[2]->Int32Value();
     if (off+len > buffer_len) {
       return ThrowException(Exception::Error(
-            String::New("Length is extends beyond buffer")));
+            String::New("off + len > buffer.length")));
     }
 
     // Assign 'buffer_' while we parse. The callbacks will access that varible.