diff --git a/debuggerd/libdebuggerd/tombstone_proto.cpp b/debuggerd/libdebuggerd/tombstone_proto.cpp
index 159ebc8..9a565de 100644
--- a/debuggerd/libdebuggerd/tombstone_proto.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto.cpp
@@ -82,6 +82,8 @@
   return Architecture::X86;
 #elif defined(__x86_64__)
   return Architecture::X86_64;
+#elif defined(__riscv) && (__riscv_xlen == 64)
+  return Architecture::RISCV64;
 #else
 #error Unknown architecture!
 #endif
diff --git a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
index 0265641..28154a7 100644
--- a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
@@ -47,6 +47,8 @@
       return "arm";
     case Architecture::ARM64:
       return "arm64";
+    case Architecture::RISCV64:
+      return "riscv64";
     case Architecture::X86:
       return "x86";
     case Architecture::X86_64:
@@ -62,6 +64,8 @@
       return 4;
     case Architecture::ARM64:
       return 8;
+    case Architecture::RISCV64:
+      return 8;
     case Architecture::X86:
       return 4;
     case Architecture::X86_64:
@@ -119,6 +123,10 @@
       special_registers = {"ip", "lr", "sp", "pc", "pst"};
       break;
 
+    case Architecture::RISCV64:
+      special_registers = {"ra", "sp", "pc"};
+      break;
+
     case Architecture::X86:
       special_registers = {"ebp", "esp", "eip"};
       break;
diff --git a/debuggerd/proto/tombstone.proto b/debuggerd/proto/tombstone.proto
index f0d3d3f..49865a2 100644
--- a/debuggerd/proto/tombstone.proto
+++ b/debuggerd/proto/tombstone.proto
@@ -48,8 +48,9 @@
   ARM64 = 1;
   X86 = 2;
   X86_64 = 3;
+  RISCV64 = 4;
 
-  reserved 4 to 999;
+  reserved 5 to 999;
 }
 
 message Signal {