diff --git a/vdo/cpu.h b/vdo/cpu.h
index e4b39c2b..ee449b7c 100644
--- a/vdo/cpu.h
+++ b/vdo/cpu.h
@@ -20,7 +20,7 @@
 #define CACHE_LINE_BYTES 128
 #elif defined(__s390x__)
 #define CACHE_LINE_BYTES 256
-#elif defined(__x86_64__) || defined(__aarch64__)
+#elif defined(__x86_64__) || defined(__aarch64__) || defined(__riscv)
 #define CACHE_LINE_BYTES 64
 #else
 #error "unknown cache line size"
diff --git a/vdo/volume.h b/vdo/volume.h
index 3a9a8d5e..93f13a42 100644
--- a/vdo/volume.h
+++ b/vdo/volume.h
@@ -356,6 +356,9 @@ int __must_check get_volume_page(struct volume *volume,
 				 byte **data_ptr,
 				 struct delta_index_page **index_page_ptr);
 
+#if defined(__riscv)
+#define get_cache_size get_cache_size_alias
+#endif
 size_t __must_check get_cache_size(struct volume *volume);
 
 int __must_check