diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa65b0d6c..5dca1fe6c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -837,6 +837,8 @@ function(get_flags CCID CCVER)
     set(GF_CXX_FLAGS ${CXX_FLAGS} PARENT_SCOPE)
 endfunction()
 
+list(APPEND CXX_FLAGS -std=c++20)
+
 if (LLAMA_FATAL_WARNINGS)
     if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
         list(APPEND C_FLAGS   -Werror)