diff --git a/config2.h.in b/config2.h.in
index 2a445eb3..788b8ae1 100644
--- a/config2.h.in
+++ b/config2.h.in
@@ -131,6 +131,9 @@
 /* Define if you want: LEDs support */
 #mesondefine CONFIG_LEDS
 
+/* Define as 1 to use the libcss library */
+#mesondefine CONFIG_LIBCSS
+
 /* Define as 1 to use the libdom library. */
 #mesondefine CONFIG_LIBDOM
 
diff --git a/meson.build b/meson.build
index 0c7f5330..6cdabc11 100644
--- a/meson.build
+++ b/meson.build
@@ -409,6 +409,7 @@ endif
 if conf_data.get('CONFIG_ECMASCRIPT_SMJS') or conf_data.get('CONFIG_QUICKJS') or conf_data.get('CONFIG_MUJS')
     cssdeps = dependency('libcss', static: st, version: '>=0.9.1')
     deps += cssdeps
+    conf_data.set('CONFIG_LIBCSS', 1)
 endif
 
 if conf_data.get('CONFIG_SCRIPTING_LUA')