diff --git a/src/core.c b/src/core.c
index 1f2b7adb..c4681f7e 100644
--- a/src/core.c
+++ b/src/core.c
@@ -6786,7 +6786,7 @@ __hot static pgno_t *scan4seq_neon(pgno_t *range, const size_t len,
 #ifdef scan4seq_impl
 /* The scan4seq_impl() is the best or no alternatives */
 #elif !MDBX_HAVE_BUILTIN_CPU_SUPPORTS
-/* The scan4seq_default() will be used  since no cpu-features detection support
+/* The scan4seq_default() will be used since no cpu-features detection support
  * from compiler. Please don't ask to implement cpuid-based detection and don't
  * make such PRs. */
 #define scan4seq_impl scan4seq_default
diff --git a/src/options.h b/src/options.h
index 596efdc0..0ef27e6f 100644
--- a/src/options.h
+++ b/src/options.h
@@ -220,7 +220,11 @@
 #endif /* MDBX_HAVE_C11ATOMICS */
 
 /** If defined then enables use the GCC's `__builtin_cpu_supports()`
- *  for runtime dispatching depending on the CPU's capabilities. */
+ * for runtime dispatching depending on the CPU's capabilities.
+ * \note Defining `MDBX_HAVE_BUILTIN_CPU_SUPPORTS` to `0` should avoided unless
+ * build for particular single-target platform, since on AMD64/x86 this disables
+ * dynamic choice (at runtime) of SSE2 / AVX2 / AVX512 instructions
+ * with fallback to non-accelerated baseline code. */
 #ifndef MDBX_HAVE_BUILTIN_CPU_SUPPORTS
 #if defined(__APPLE__) || defined(BIONIC)
 /* Never use any modern features on Apple's or Google's OSes