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-rw-r--r--ext/zlib/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/zlib/extconf.rb b/ext/zlib/extconf.rb
index 499f55a0464..d94fea743b4 100644
--- a/ext/zlib/extconf.rb
+++ b/ext/zlib/extconf.rb
@@ -58,6 +58,7 @@ if %w'z libz zlib1 zlib zdll'.find {|z| have_library(z, 'deflateReset')} and
have_func('crc32_combine', 'zlib.h')
have_func('adler32_combine', 'zlib.h')
+ have_type('z_crc_t', 'zlib.h')
create_makefile('zlib')