diff --git a/pyoptsparse/pyParOpt/ParOpt.py b/pyoptsparse/pyParOpt/ParOpt.py
index 044f359b..3b64140b 100644
--- a/pyoptsparse/pyParOpt/ParOpt.py
+++ b/pyoptsparse/pyParOpt/ParOpt.py
@@ -173,7 +173,7 @@ def __call__(
 
             class Problem(_ParOpt.Problem):
                 def __init__(self, ptr, n, m, xs, blx, bux):
-                    super().__init__(MPI.COMM_SELF, n, m)
+                    super().__init__(MPI.COMM_SELF, nvars=n, ncon=m)
                     self.ptr = ptr
                     self.n = n
                     self.m = m