diff --git a/open-reac/src/main/resources/openreac/acopf.mod b/open-reac/src/main/resources/openreac/acopf.mod
index 35b42846..5ed1d276 100644
--- a/open-reac/src/main/resources/openreac/acopf.mod
+++ b/open-reac/src/main/resources/openreac/acopf.mod
@@ -134,7 +134,7 @@ var Red_Tran_Rea_Inv{(qq,m,n) in BRANCHCC } =
 
 var Red_Tran_Act_Dir_Side_2_Opened{(qq,m,n) in BRANCHCC_WITH_SIDE_2_OPENED} =
     (branch_Ror[qq,m,n])**2 * V[m] * (branch_Gor_mod[qq,m,n] + (branch_admi[qq,m,n])**2 * branch_Gex_mod[qq,m,n] / ( (branch_Gex_mod[qq,m,n] + branch_admi[qq,m,n] * sin(branch_angper[qq,m,n]))**2
-    + (- branch_Bex_mod[qq,m,n] + branch_admi[qq,m,n] * cos(branch_angper[qq,m,n]))**2 )
+    + (- branch_Bex_mod[qq,m,n] + branch_admi[qq,m,n] * cos(branch_angper[qq,m,n]))**2 ) 
     + ((branch_Bex_mod[qq,m,n])**2 + (branch_Gex_mod[qq,m,n])**2) * branch_admi[qq,m,n] * sin(branch_angper[qq,m,n]) / ( (branch_Gex_mod[qq,m,n] + branch_admi[qq,m,n] * sin(branch_angper[qq,m,n]))**2
     + (- branch_Bex_mod[qq,m,n] + branch_admi[qq,m,n] * cos(branch_angper[qq,m,n]))**2 ))
   ;