diff --git a/tools/mkallsyms.sh b/tools/mkallsyms.sh
index 37c1cbac8d..3e673decf6 100755
--- a/tools/mkallsyms.sh
+++ b/tools/mkallsyms.sh
@@ -50,10 +50,6 @@ 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 "{"