diff --git a/include/SDL3/SDL_intrin.h b/include/SDL3/SDL_intrin.h
index adec1346d..d3fb696ff 100644
--- a/include/SDL3/SDL_intrin.h
+++ b/include/SDL3/SDL_intrin.h
@@ -113,6 +113,7 @@ _m_prefetch(void *__P)
 #if defined(__loongarch_asx) && !defined(SDL_DISABLE_LASX)
 #include <lasxintrin.h>
 #endif
+#if defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || defined(_M_IX86)
 #if (defined(__AVX__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_AVX)
 #include <immintrin.h>
 #endif
@@ -128,5 +129,6 @@ _m_prefetch(void *__P)
 #if (defined(__SSE3__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_SSE3)
 #include <pmmintrin.h>
 #endif
+#endif /**/
 
 #endif /* SDL_intrin_h_ */
diff --git a/src/SDL_internal.h b/src/SDL_internal.h
index fd65cf864..9e8487e2f 100644
--- a/src/SDL_internal.h
+++ b/src/SDL_internal.h
@@ -194,6 +194,8 @@
 #define HAVE_NEON_INTRINSICS 1
 #endif
 
+#if defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || defined(_M_IX86)
+
 #if (defined(__MMX__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_MMX)
 #define HAVE_MMX_INTRINSICS 1
 #endif
@@ -214,6 +216,8 @@
 #define HAVE_AVX_INTRINSICS 1
 #endif
 
+#endif /* x86/x64 */
+
 #if defined(__loongarch_sx) && !defined(SDL_DISABLE_LSX)
 #define HAVE_LSX_INTRINSICS 1
 #endif