diff --git a/tools/mkallsyms.sh b/tools/mkallsyms.sh
index 8b6de5c7258..8cc313885e3 100755
--- a/tools/mkallsyms.sh
+++ b/tools/mkallsyms.sh
@@ -44,6 +44,10 @@ fi
 echo "#include <nuttx/compiler.h>"
 echo "#include <nuttx/symtab.h>"
 echo ""
+echo "#if defined(__GNUC__) && !defined(__clang__)"
+echo "#  pragma GCC diagnostic ignored \"-Wbuiltin-declaration-mismatch\""
+echo "#endif"
+echo ""
 echo "const int             g_nallsyms = ${count} + 2;"
 echo "const struct symtab_s g_allsyms[${count} + 2] = "
 echo "{"