diff --git a/Make.inc b/Make.inc
index ad38fab..48efddf 100644
--- a/Make.inc
+++ b/Make.inc
@@ -92,6 +92,7 @@ override ARCH := mips
 endif
 ifeq ($(findstring riscv64,$(ARCH)),riscv64)
 override ARCH := riscv64
+MARCH ?= rv64gc
 endif
 ifeq ($(findstring loongarch64,$(ARCH)),loongarch64)
 override ARCH := loongarch64
diff --git a/Makefile b/Makefile
index 17e03a0..b096cf3 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ ifeq ($(LONG_DOUBLE_NOT_DOUBLE),1)
 ifneq ($(filter $(ARCH),i387 amd64),)
 SUBDIRS += ld80
 else
-ifneq ($(filter $(ARCH),aarch64),)
+ifneq ($(filter $(ARCH),aarch64 riscv64),)
 SUBDIRS += ld128
 else
 endif