diff --git a/components/style/font_face.rs b/components/style/font_face.rs
index 381ea00bc1e..d9c547a1e18 100644
--- a/components/style/font_face.rs
+++ b/components/style/font_face.rs
@@ -562,7 +562,7 @@ impl Parse for Source {
         };
 
         // Parse optional tech()
-        let tech_flags = if input
+        let tech_flags = if static_prefs::pref!("layout.css.font-tech.enabled") && input
             .try_parse(|input| input.expect_function_matching("tech"))
             .is_ok()
         {