diff --git a/repos/libports/lib/mk/gmp.inc b/repos/libports/lib/mk/gmp.inc
index 3a45577edf..9d5c7e7d37 100644
--- a/repos/libports/lib/mk/gmp.inc
+++ b/repos/libports/lib/mk/gmp.inc
@@ -5,5 +5,8 @@ include $(REP_DIR)/lib/import/import-gmp.mk
 LIBS += libc
 
 CC_OPT += -DHAVE_CONFIG_H -D__GMP_WITHIN_GMP
+CC_OPT += -Wno-unused-variable -Wno-unused-but-set-variable
+CC_OPT += -Wno-implicit-function-declaration -Wno-unused-function
+CC_OPT += -Wno-unused-value
 
 INC_DIR += $(GMP_DIR)