diff --git a/homeassistant/components/forecast_solar/config_flow.py b/homeassistant/components/forecast_solar/config_flow.py
index 86de17ef285..600ed363a8b 100644
--- a/homeassistant/components/forecast_solar/config_flow.py
+++ b/homeassistant/components/forecast_solar/config_flow.py
@@ -99,7 +99,7 @@ class ForecastSolarOptionFlowHandler(OptionsFlow):
                         CONF_API_KEY,
                         description={
                             "suggested_value": self.config_entry.options.get(
-                                CONF_API_KEY
+                                CONF_API_KEY, ""
                             )
                         },
                     ): str,