diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk
index 0934a9e6fc2f..b758825d51ed 100644
--- a/share/mk/src.opts.mk
+++ b/share/mk/src.opts.mk
@@ -392,6 +392,8 @@ BROKEN_OPTIONS+=NVME
 .if ${__T:Msparc64}
 # Sparc64 need extra crt*.o files - PR 239851
 BROKEN_OPTIONS+=BSD_CRTBEGIN
+# PR 233405
+BROKEN_OPTIONS+=LLVM_LIBUNWIND
 .endif
 
 .if ${COMPILER_FEATURES:Mc++11} && \