diff --git a/docs/en/unit/tvoc.md b/docs/en/unit/tvoc.md
index 6276fe55..d618fd12 100644
--- a/docs/en/unit/tvoc.md
+++ b/docs/en/unit/tvoc.md
@@ -26,7 +26,6 @@
 ## Applications
 
 - Air quality monitoring
-- Formaldehyde detection
 - eCO2 concentration
 
 ## Specification