bundle install fails on Ruby 2.1.5

[rtyler]

➜  zipkin-query git:(master) ✗ bundle install
Fetching gem metadata from https://rubygems.org/..
Fetching version metadata from https://rubygems.org/.
Resolving dependencies...

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/tyler/.rvm/rubies/ruby-2.1.5/bin/ruby -r ./siteconf20150705-17740-1e3zhpw.rb extconf.rb
checking for strlcpy() in string.h... no
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling binary_protocol_accelerated.c
compiling compact_protocol.c
compiling thrift_native.c
compiling memory_buffer.c
compiling protocol.c
compiling struct.c
struct.c:28:1: error: static declaration of ‘strlcpy’ follows non-static declaration
 strlcpy (char *dst, const char *src, size_t dst_sz)
 ^
In file included from /home/tyler/.rvm/rubies/ruby-2.1.5/include/ruby-2.1.0/ruby/defines.h:68:0,
                 from /home/tyler/.rvm/rubies/ruby-2.1.5/include/ruby-2.1.0/ruby/ruby.h:29,
                 from /home/tyler/.rvm/rubies/ruby-2.1.5/include/ruby-2.1.0/ruby.h:33,
                 from struct.h:22,
                 from struct.c:20:
/home/tyler/.rvm/rubies/ruby-2.1.5/include/ruby-2.1.0/ruby/missing.h:207:20: note: previous declaration of ‘strlcpy’ was here
 RUBY_EXTERN size_t strlcpy(char *, const char*, size_t);
                    ^
Makefile:224: recipe for target 'struct.o' failed
make: *** [struct.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/tyler/.rvm/gems/ruby-2.1.5@rubygems/gems/thrift-0.6.0 for inspection.
Results logged to /home/tyler/.rvm/gems/ruby-2.1.5@rubygems/extensions/x86_64-linux/2.1.0/thrift-0.6.0/gem_make.out
An error occurred while installing thrift (0.6.0), and Bundler cannot continue.
Make sure that `gem install thrift -v '0.6.0'` succeeds before bundling.
➜  zipkin-query git:(master) ✗