diff --git a/src/meta/minifier.js b/src/meta/minifier.js
index 324b827797..ce6fd84a09 100644
--- a/src/meta/minifier.js
+++ b/src/meta/minifier.js
@@ -167,7 +167,7 @@ actions.buildCSS = async function buildCSS(data) {
 		if (data.minify) {
 			opts.silenceDeprecations = [
 				'legacy-js-api', 'color-functions',
-				'global-builtin', 'import',
+				'global-builtin', 'import', 'if-function',
 			];
 		}
 		const scssOutput = await sass.compileStringAsync(data.source, opts);