diff --git a/src/opflow/model/power_bal_polar/pbpol.cpp b/src/opflow/model/power_bal_polar/pbpol.cpp
index 95b352d1..d67e16cb 100644
--- a/src/opflow/model/power_bal_polar/pbpol.cpp
+++ b/src/opflow/model/power_bal_polar/pbpol.cpp
@@ -65,8 +65,8 @@ PetscErrorCode OPFLOWSetVariableBounds_PBPOL(OPFLOW opflow, Vec Xl, Vec Xu) {
     /* Bounds on bus variables */
     loc = bus->startxVloc;
 
-    xl[loc] = -PETSC_PI;
-    xu[loc] = PETSC_PI;
+    xl[loc] = PETSC_NINFINITY;
+    xu[loc] = PETSC_INFINITY;
 
     if (opflow->genbusvoltagetype == VARIABLE_WITHIN_BOUNDS) {
       xl[loc + 1] = bus->Vmin;