diff --git a/src/crop/simplecrop.jl b/src/crop/simplecrop.jl
index 348d9448561f693d1e1f951d33b9b7781ea2187a..bc4f11dc1c9cd4b52d18274ff626af7e73cddabd 100644
--- a/src/crop/simplecrop.jl
+++ b/src/crop/simplecrop.jl
@@ -43,7 +43,7 @@ cropyield(cs::CropState) = 0.0  # TODO: units?
 isharvestable(cs::CropState) = true
 
 """
-    stepagent!(farmplot, model)
+    stepagent!(cropstate, model)
 
 Update a crop state by one day.
 """