diff --git a/package/collectd/Config.in b/package/collectd/Config.in
index 127bcace6d..d1ed36ef5e 100644
--- a/package/collectd/Config.in
+++ b/package/collectd/Config.in
@@ -393,15 +393,17 @@ config BR2_PACKAGE_COLLECTD_MYSQL
 	bool "mysql"
 	depends on BR2_INSTALL_LIBSTDCPP # mysql
 	depends on BR2_USE_MMU # mysql
+	depends on BR2_USE_WCHAR # fmt -> mariadb
 	depends on BR2_TOOLCHAIN_HAS_THREADS # mysql
 	select BR2_PACKAGE_MARIADB
 	help
 	  Connects to a MySQL database and issues a "show status"
 	  command.
 
-comment "mysql needs a toolchain w/ C++, threads"
+comment "mysql needs a toolchain w/ C++, threads, wchar"
 	depends on BR2_USE_MMU
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS \
+		|| !BR2_USE_WCHAR
 
 config BR2_PACKAGE_COLLECTD_NETLINK
 	bool "netlink"