diff --git a/IBPSA/Electrical/DC/Sources/Validation/PVSingleDiodeNISTValidation.mo b/IBPSA/Electrical/DC/Sources/Validation/PVSingleDiodeNISTValidation.mo
index 2868744bd4..8d845bba58 100644
--- a/IBPSA/Electrical/DC/Sources/Validation/PVSingleDiodeNISTValidation.mo
+++ b/IBPSA/Electrical/DC/Sources/Validation/PVSingleDiodeNISTValidation.mo
@@ -11,7 +11,7 @@ model PVSingleDiodeNISTValidation
   parameter Modelica.Units.SI.Angle lat=39.1354*Modelica.Constants.pi/180
     "Latitude";
   parameter Modelica.Units.SI.Angle azi=0
-    "Surface azimuth. azi=-90 degree if surface outward unit normal points toward east, azi=0 if it points toward south";
+    "Surface azimuth. azi=min 90 degree if surface outward unit normal points toward east, azi=0 if it points toward south";
   parameter Modelica.Units.SI.Angle til=10*Modelica.Constants.pi/180
     "Surface tilt. til=90 degree for walls, til=0 for ceilings, til=180 for roof";