diff --git a/tools/mksymtab.sh b/tools/mksymtab.sh
index cfdd6ff95..9275945eb 100755
--- a/tools/mksymtab.sh
+++ b/tools/mksymtab.sh
@@ -57,11 +57,6 @@ 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 ""
-
 for string in $varlist; do
   var=`echo $string | sed -e "s/\"//g"`
   echo "extern void *${var};"