diff --git a/cc/config/riscv64_device.go b/cc/config/riscv64_device.go
index a63d5c237..d66697c6b 100644
--- a/cc/config/riscv64_device.go
+++ b/cc/config/riscv64_device.go
@@ -29,12 +29,14 @@ var (
 		// A temporary fix for SExtWRemoval miscompilation bug.
 		"-mllvm",
 		"-riscv-disable-sextw-removal=true",
+		"-march=rv64gc_zbb",
 	}
 
 	riscv64ArchVariantCflags = map[string][]string{}
 
 	riscv64Ldflags = []string{
 		"-Wl,--hash-style=gnu",
+		"-march=rv64gc_zbb",
 	}
 
 	riscv64Lldflags = append(riscv64Ldflags,