diff --git a/src/component.js b/src/component.js
index eecc1c52..834ee77e 100644
--- a/src/component.js
+++ b/src/component.js
@@ -18,8 +18,8 @@ module.exports = C => (...args) => {
     next.className = [
       next.className,
       ...args.map(a => typeof a === 'function' ? a(styleProps) : a)
-        .filter(s => s !== null)
-      .map(s => cxs(s)),
+        .filter(s => !!s)
+        .map(s => cxs(s))
       cxs(props.css || {})
     ].join(' ').trim()
 
diff --git a/src/monocomponent.js b/src/monocomponent.js
index d9300599..eb186ac0 100644
--- a/src/monocomponent.js
+++ b/src/monocomponent.js
@@ -15,7 +15,7 @@ module.exports = C => (...args) => {
     next.className = [
       next.className,
       ...args.map(a => typeof a === 'function' ? a(styleProps) : a)
-        .filter(s => s !== null)
+        .filter(s => !!s)
         .map(s => cxs(s))
     ].join(' ').trim()