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-rw-r--r--ext/zlib/depend1
1 files changed, 0 insertions, 1 deletions
diff --git a/ext/zlib/depend b/ext/zlib/depend
index 623b54a885..72085904fa 100644
--- a/ext/zlib/depend
+++ b/ext/zlib/depend
@@ -147,7 +147,6 @@ zlib.o: $(hdrdir)/ruby/backward.h
zlib.o: $(hdrdir)/ruby/backward/2/assume.h
zlib.o: $(hdrdir)/ruby/backward/2/attributes.h
zlib.o: $(hdrdir)/ruby/backward/2/bool.h
-zlib.o: $(hdrdir)/ruby/backward/2/extern.h
zlib.o: $(hdrdir)/ruby/backward/2/gcc_version_since.h
zlib.o: $(hdrdir)/ruby/backward/2/inttypes.h
zlib.o: $(hdrdir)/ruby/backward/2/limits.h