diff --git a/repos/libports/lib/mk/liblzma.mk b/repos/libports/lib/mk/liblzma.mk
index 69ed706ade..d2da1dd7e8 100644
--- a/repos/libports/lib/mk/liblzma.mk
+++ b/repos/libports/lib/mk/liblzma.mk
@@ -58,3 +58,5 @@ INC_DIR += $(LIBLZMA_DIR)/../common \
 LIBS += libc
 
 SHARED_LIB = yes
+
+CC_OPT_lz_encoder_mf += -Wno-unused-function