diff --git a/controllers/forecast_controller.go b/controllers/forecast_controller.go
index 4c900fbaa272f2934085430556e3663f1ff09cbf..da807954cba809e06c1d8608a10603cb356651e6 100644
--- a/controllers/forecast_controller.go
+++ b/controllers/forecast_controller.go
@@ -23,7 +23,7 @@ import (
 // @Param plant_date query string true "Plant date RFC3339 format"
 // @Param mode query string true "Mode, rm (relative maturity) or gdds_to_maturity"
 // @Param value query int true "Value of mode"
-// @Param comparison query int false "comparison. -1 for normals, or any int between 1981 and 2021 for a single year" default(-1)
+// @Param comparison query int false "comparison. -1 for normals, or any int between 1981 and the prev. year" default(-1)
 // @Router /gdd/forecast/stages [get]
 func ForecastStages(c *fiber.Ctx) error {
 	ctx := common.DawnCtx{FiberCtx: c}