Percent encoding routines
diff --git a/binding.gyp b/binding.gyp
index 17dbfc0..8d8382f 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -516,6 +516,7 @@
         'src/core/lib/support/log_posix.c',
         'src/core/lib/support/log_windows.c',
         'src/core/lib/support/murmur_hash.c',
+        'src/core/lib/support/percent_encoding.c',
         'src/core/lib/support/slice.c',
         'src/core/lib/support/slice_buffer.c',
         'src/core/lib/support/stack_lockfree.c',