diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4211d7a2..c2787a1d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -60,7 +60,7 @@ if(ANDROID)
     if(ANDROID_NATIVE_API_LEVEL LESS 33)
       message(FATAL_ERROR "FastTokenizers require ANDROID_NATIVE_API_LEVEL to be higher than 33. Please, either disable FastTokenizers or set ANDROID_NATIVE_API_LEVEL / ANDROID_PLATFORM")
     endif()
-  elseif(X86_64)
+  elseif(X86_64 OR RISCV64)
     message(WARNING "FastTokenizers are not available on ${CMAKE_SYSTEM_NAME} ${CMAKE_SYSTEM_PROCESSOR}. ENABLE_FAST_TOKENIZERS is set to OFF")
     set(FAST_TOKENIZERS_SUPPORTED OFF)
   else()