ext/webp_ffi/Rakefile in webp-ffi-0.1.0 vs ext/webp_ffi/Rakefile in webp-ffi-0.1.1

@@ -11,9 +11,10 @@
   c.have_func?('WebPGetInfo')
   c.have_library?('webp')
   # libs
   c.have_library?('png')
   c.have_library?('jpeg')
+  c.have_library?('tiff')
   # compiler flags
   c.cflags << "-arch x86_64" if c.platform.mac?
   c.ldflags << "-arch x86_64" if c.platform.mac?
 end