diff --git a/pvlib/temperature.py b/pvlib/temperature.py
index fed5cdca89..8de0a15872 100644
--- a/pvlib/temperature.py
+++ b/pvlib/temperature.py
@@ -307,6 +307,10 @@ def faiman(poa_global, temp_air, wind_speed=1.0, u0=25.0, u1=6.84):
 
     Notes
     -----
+    Faiman uses the parameter names U'_0 and U'_1 in equation 5 of [1]_, which
+    is the equation referred to as the Faiman model. In IEC-61853 and also in
+    this function the primes (') are omitted from the parameter names.
+
     All arguments may be scalars or vectors. If multiple arguments
     are vectors they must be the same length.