diff --git a/src/internals.h b/src/internals.h
index bececace..5cf80e15 100644
--- a/src/internals.h
+++ b/src/internals.h
@@ -65,6 +65,10 @@
 
 #ifdef _MSC_VER
 #   if _MSC_FULL_VER < 190024234
+        /* Actually libmdbx was not tested with compilers older than 19.00.24234 (Visual Studio 2015 Update 3).
+         * But you could remove this #error and try to continue at your own risk.
+         * In such case please don't rise up an issues related ONLY to old compilers.
+         */
 #       error "At least \"Microsoft C/C++ Compiler\" version 19.00.24234 (Visual Studio 2015 Update 3) is required."
 #   endif
 #   ifndef _CRT_SECURE_NO_WARNINGS
@@ -101,8 +105,8 @@
 #include "defs.h"
 
 #if defined(__GNUC__) && !__GNUC_PREREQ(4,2)
-    /* Actually libmdbx was not tested with compilers older than GCC from RHEL6.
-     * But you could remove this #error and try to continue at your own risk.
+    /* Actually libmdbx was not tested with compilers older than GCC 4.2.
+     * But you could ignore this warning at your own risk.
      * In such case please don't rise up an issues related ONLY to old compilers.
      */
 #   warning "libmdbx required GCC >= 4.2"
@@ -110,18 +114,18 @@
 
 #if defined(__clang__) && !__CLANG_PREREQ(3,8)
     /* Actually libmdbx was not tested with CLANG older than 3.8.
-     * But you could remove this #error and try to continue at your own risk.
+     * But you could ignore this warning at your own risk.
      * In such case please don't rise up an issues related ONLY to old compilers.
      */
 #   warning "libmdbx required CLANG >= 3.8"
 #endif
 
 #if defined(__GLIBC__) && !__GLIBC_PREREQ(2,12)
-    /* Actually libmdbx was not tested with something older than glibc 2.12 (from RHEL6).
-     * But you could remove this #error and try to continue at your own risk.
+    /* Actually libmdbx was not tested with something older than glibc 2.12.
+     * But you could ignore this warning at your own risk.
      * In such case please don't rise up an issues related ONLY to old systems.
      */
-#   warning "libmdbx required at least GLIBC 2.12."
+#   warning "libmdbx was only tested with GLIBC >= 2.12."
 #endif
 
 #ifdef __SANITIZE_THREAD__