diff --git a/libc/private/libc_logging.h b/libc/private/libc_logging.h
index 7dd97a4..35c756b 100644
--- a/libc/private/libc_logging.h
+++ b/libc/private/libc_logging.h
@@ -88,7 +88,7 @@
 
 //
 // Formatting routines for the C library's internal debugging.
-// Unlike the usual alternatives, these don't allocate.
+// Unlike the usual alternatives, these don't allocate, and they don't drag in all of stdio.
 //
 
 __LIBC_HIDDEN__ int __libc_format_buffer(char* buffer, size_t buffer_size, const char* format, ...)