diff --git a/addons/source-python/data/source-python/entities/CSmokeStack.ini b/addons/source-python/data/source-python/entities/CSmokeStack.ini
index e78f865ee..a165969ca 100644
--- a/addons/source-python/data/source-python/entities/CSmokeStack.ini
+++ b/addons/source-python/data/source-python/entities/CSmokeStack.ini
@@ -19,3 +19,8 @@
     twist = Twist
     wind_angle = WindAngle
     wind_speed = WindSpeed
+
+    [[smoke_material]]
+        name = SmokeMaterial
+        type = STRING
+