diff --git a/src/Comment.php b/src/Comment.php
index d4e1764..418c66e 100644
--- a/src/Comment.php
+++ b/src/Comment.php
@@ -63,11 +63,12 @@ protected function doStrip(string $json): string
         $crlf   = ["\n" => '\n', "\r" => '\r'];
 
         while (isset($json[++$this->index])) {
+            $oldprev                  = $prev ?? '';
             list($prev, $char, $next) = $this->getSegments($json);
 
             $return = $this->checkTrail($char, $return);
 
-            if ($this->inStringOrCommentEnd($prev, $char, $char . $next)) {
+            if ($this->inStringOrCommentEnd($prev, $char, $char . $next, $oldprev)) {
                 $return .= $this->inStr && isset($crlf[$char]) ? $crlf[$char] : $char;
 
                 continue;
@@ -115,19 +116,19 @@ protected function checkTrail(string $char, string $json): string
         return $json;
     }
 
-    protected function inStringOrCommentEnd(string $prev, string $char, string $next): bool
+    protected function inStringOrCommentEnd(string $prev, string $char, string $next, string $oldprev): bool
     {
-        return $this->inString($char, $prev, $next) || $this->inCommentEnd($next);
+        return $this->inString($char, $prev, $next, $oldprev) || $this->inCommentEnd($next);
     }
 
-    protected function inString(string $char, string $prev, string $next): bool
+    protected function inString(string $char, string $prev, string $next, string $oldprev): bool
     {
         if (0 === $this->comment && $char === '"' && $prev !== '\\') {
             return $this->inStr = !$this->inStr;
         }
 
         if ($this->inStr && \in_array($next, ['":', '",', '"]', '"}'], true)) {
-            $this->inStr = false;
+            $this->inStr = "$oldprev$prev" !== '\\\\';
         }
 
         return $this->inStr;
diff --git a/tests/CommentTest.php b/tests/CommentTest.php
index af763f2..654769e 100644
--- a/tests/CommentTest.php
+++ b/tests/CommentTest.php
@@ -64,9 +64,33 @@ public function testParseFromFile()
         $parsed = Comment::parseFromFile(__DIR__ . '/composer.json', true);
 
         $this->assertTrue(is_array($parsed));
+        $this->assertNotEmpty($parsed);
         $this->assertSame('adhocore/json-comment', $parsed['name']);
     }
 
+    public function testSubJson()
+    {
+        // https://github.com/adhocore/php-json-comment/issues/15
+        $parsed = Comment::parse('{
+            "jo": "{
+                /* comment */
+                \"url\": \"http://example.com\"//comment
+            }",
+            "x": {
+              /* comment 1
+                 comment 2 */
+              "y": {
+                // comment
+                "XY\\\": "//no comment/*",
+              },
+            }
+        }', true);
+
+        $this->assertArrayHasKey('jo', $parsed);
+        $this->assertSame('//no comment/*', $parsed['x']['y']['XY\\']);
+        $this->assertSame('http://example.com', Comment::parse($parsed['jo'])->url);
+    }
+
     public function theTests()
     {
         return [