diff --git a/CMakeLists.txt b/CMakeLists.txt
index f66b7726054d4..96620afe7fcdc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -893,6 +893,7 @@ if(SDL_ASSEMBLY)
         set(HAVE_ALTIVEC TRUE)
         set(SDL_ALTIVEC_BLITTERS 1)
         sdl_compile_options(PRIVATE "-maltivec")
+        sdl_compile_options(PRIVATE "-fno-tree-vectorize")
         set_property(SOURCE "${SDL3_SOURCE_DIR}/src/video/SDL_blit_N.c" APPEND PROPERTY COMPILE_DEFINITIONS "SDL_ENABLE_ALTIVEC")
         set_property(SOURCE "${SDL3_SOURCE_DIR}/src/video/SDL_blit_N.c" PROPERTY SKIP_PRECOMPILE_HEADERS 1)
       endif()