diff --git a/cmake/sdlcpu.cmake b/cmake/sdlcpu.cmake
index b0e75bf48b..69142bc832 100644
--- a/cmake/sdlcpu.cmake
+++ b/cmake/sdlcpu.cmake
@@ -1,6 +1,6 @@
 function(SDL_DetectTargetCPUArchitectures DETECTED_ARCHS)
 
-  set(known_archs EMSCRIPTEN ARM32 ARM64 LOONGARCH64 POWERPC32 POWERPC64 X86 X64)
+  set(known_archs EMSCRIPTEN ARM32 ARM64 ARM64EC LOONGARCH64 POWERPC32 POWERPC64 X86 X64)
 
   if(APPLE AND CMAKE_OSX_ARCHITECTURES)
     foreach(known_arch IN LISTS known_archs)