diff --git a/tempo-ess-dynamic.py b/tempo-ess-dynamic.py
index c32344f..b92898d 100755
--- a/tempo-ess-dynamic.py
+++ b/tempo-ess-dynamic.py
@@ -167,7 +167,7 @@ if use_eco:
             tomorrow = 0
         elif demaintarif == "BLEU":
             tomorrow = 0
-        elif demaintarif == "BLANC":
+        elif demaintarif == "BLAN":
             tomorrow = 1
         elif demaintarif == "ROUG":
             tomorrow = 2