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-rw-r--r--Mk/bsd.ruby.mk4
1 files changed, 4 insertions, 0 deletions
diff --git a/Mk/bsd.ruby.mk b/Mk/bsd.ruby.mk
index 821162dedc2b..a6daf4513b71 100644
--- a/Mk/bsd.ruby.mk
+++ b/Mk/bsd.ruby.mk
@@ -184,6 +184,10 @@ CONFIGURE_TARGET= # empty
RUBY_CONFIGURE_ARGS+= --target="${RUBY_ARCH}" --program-prefix=""
+.if ${OSVERSION} >= 501000
+.undef RUBY_WITH_PTHREAD
+.endif
+
.if defined(RUBY_WITH_PTHREAD)
RUBY_CONFIGURE_ARGS+= --with-libc_r=yes
RUBY_R= _r