diff --git a/src/mdbx.c b/src/mdbx.c
index d2a0e0f1..e6534c82 100644
--- a/src/mdbx.c
+++ b/src/mdbx.c
@@ -1133,8 +1133,8 @@ const char *__cold mdbx_strerror_r(int errnum, char *buf, size_t buflen) {
 const char *__cold mdbx_strerror(int errnum) {
   const char *msg = __mdbx_strerr(errnum);
   if (!msg) {
-    static char buffer[1024];
 #ifdef _MSC_VER
+    static char buffer[1024];
     size_t size = FormatMessageA(
         FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
         errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buffer,
@@ -1143,6 +1143,7 @@ const char *__cold mdbx_strerror(int errnum) {
       msg = buffer;
 #else
     if (errnum < 0) {
+      static char buffer[32];
       int rc = snprintf(buffer, sizeof(buffer) - 1, "unknown error %d", errnum);
       assert(rc > 0);
       (void)rc;