diff --git a/package/base-files/Makefile b/package/base-files/Makefile
index 7e0d341705..c3d2aac2bb 100644
--- a/package/base-files/Makefile
+++ b/package/base-files/Makefile
@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/version.mk
 include $(INCLUDE_DIR)/feeds.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=225
+PKG_RELEASE:=226
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index 323e057451..7da0c872fa 100755
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -107,9 +107,14 @@ config_unset() {
 # config_get <variable> <section> <option> [<default>]
 # config_get <section> <option>
 config_get() {
-	case "$3" in
-		"") eval echo "\"\${CONFIG_${1}_${2}:-\${4}}\"";;
-		*)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
+	case "$2${3:-$1}" in
+		*[^A-Za-z0-9_]*) : ;;
+		*)
+			case "$3" in
+				"") eval echo "\"\${CONFIG_${1}_${2}:-\${4}}\"";;
+				*)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
+			esac
+		;;
 	esac
 }