diff --git a/index.js b/index.js
index ab9a997..c322c79 100644
--- a/index.js
+++ b/index.js
@@ -21,7 +21,7 @@ function BinarySplit (matcher) {
     }
 
     while (true) {
-      var idx = firstMatch(buf, offset)
+      var idx = firstMatch(buf, offset - matcher.length + 1)
       if (idx !== -1 && idx < buf.length) {
         this.push(buf.slice(lastMatch, idx))
         offset = idx + matcher.length
diff --git a/test.js b/test.js
index 720e2c2..9998df1 100644
--- a/test.js
+++ b/test.js
@@ -90,3 +90,18 @@ test('chunked input with long matcher', function (t) {
     t.end()
   }))
 })
+
+test('lookbehind in multi character matcher', function (t) {
+  var splitStream = splitTest('\r\n\r', function (err, items) {
+    if (err) throw err
+    t.equals(items.length, 2)
+    t.equals(items[0].toString(), 'a')
+    t.equals(items[1].toString(), 'b')
+    t.end()
+  })
+
+  splitStream.write('a\r')
+  splitStream.write('\n')
+  splitStream.write('\rb')
+  splitStream.end()
+})