diff --git a/data/silane.yaml b/data/silane.yaml
index 8c4eb0e35..3b7499dd2 100644
--- a/data/silane.yaml
+++ b/data/silane.yaml
@@ -17,6 +17,10 @@ phases:
     SI3H8, SI2, SI3]
   kinetics: gas
   state: {T: 300.0, P: 1 atm}
+  deprecated: >|
+    The input file 'silane.yaml' is deprecated and will be removed after Cantera 2.6.
+    The source of the data is unknown, and the NASA polynomials for several species
+    contain discontinuities.
 
 species:
 - name: H2