diff --git a/process/physics.py b/process/physics.py
index b09fff0af0..1de78bf5f3 100644
--- a/process/physics.py
+++ b/process/physics.py
@@ -84,11 +84,9 @@ def nui(j, zmain, ni, tempi, amain):
 
 
 @nb.jit(nopython=True, cache=True)
-def _plascar_bpol(aspect, kappa, delta):
+def _plascar_bpol(aspect, eps, kappa, delta):
     # Original coding, only suitable for TARTs [STAR Code]
 
-    eps = 1.0 / aspect
-
     c1 = kappa**2 / (1.0 + delta) + delta
     c2 = kappa**2 / (1.0 - delta) - delta
 
@@ -117,7 +115,7 @@ def _plascar_bpol(aspect, kappa, delta):
 
 
 @nb.jit(nopython=True, cache=True)
-def bpol(icurr, ip, qbar, aspect, bt, kappa, delta, perim, rmu0):
+def bpol(icurr, ip, qbar, aspect, eps, bt, kappa, delta, perim, rmu0):
     """Function to calculate poloidal field
     author: J Galambos, FEDC/ORNL
     author: P J Knight, CCFE, Culham Science Centre
@@ -141,13 +139,13 @@ def bpol(icurr, ip, qbar, aspect, bt, kappa, delta, perim, rmu0):
     if icurr != 2:
         return rmu0 * ip / perim
 
-    ff1, ff2, _, _ = _plascar_bpol(aspect, kappa, delta)
+    ff1, ff2, _, _ = _plascar_bpol(aspect, eps, kappa, delta)
 
     return bt * (ff1 + ff2) / (2.0 * np.pi * qbar)
 
 
 @nb.jit(nopython=True, cache=True)
-def plasc(qbar, aspect, rminor, bt, kappa, delta):
+def plasc(qbar, aspect, eps, rminor, bt, kappa, delta):
     """Function to calculate plasma current (Peng scaling)
     author: J Galambos, FEDC/ORNL
     author: P J Knight, CCFE, Culham Science Centre
@@ -167,7 +165,7 @@ def plasc(qbar, aspect, rminor, bt, kappa, delta):
     Fusion Technology, 21, 1729
     """
 
-    ff1, ff2, d1, d2 = _plascar_bpol(aspect, kappa, delta)
+    ff1, ff2, d1, d2 = _plascar_bpol(aspect, eps, kappa, delta)
 
     e1 = 2.0 * kappa / (d1 * (1.0 + delta))
     e2 = 2.0 * kappa / (d2 * (1.0 - delta))
@@ -2094,7 +2092,7 @@ def culcur(
         if icurr == 1:  # Peng analytical fit
             fq = (1.22 - 0.68 * eps) / ((1.0 - eps * eps) ** 2) * sf**2
         elif icurr == 2:  # Peng scaling for double null divertor; TARTs [STAR Code]
-            curhat = 1.0e6 * plasc(qpsi, asp, rminor, bt, kappa, triang) / bt
+            curhat = 1.0e6 * plasc(qpsi, asp, eps, rminor, bt, kappa, triang) / bt
         elif icurr == 3:  # Simple ITER scaling (simply the cylindrical case)
             fq = 1.0
         elif icurr == 4:  # ITER formula (IPDG89)
@@ -2161,7 +2159,9 @@ def culcur(
         physics_variables.normalised_total_beta = (
             1.0e8 * physics_variables.beta * rminor * bt / plascur
         )
-        bp = bpol(icurr, plascur, qpsi, asp, bt, kappa, triang, pperim, constants.rmu0)
+        bp = bpol(
+            icurr, plascur, qpsi, asp, eps, bt, kappa, triang, pperim, constants.rmu0
+        )
 
         # Ensure current profile consistency, if required
         # This is as described in Hartmann and Zohm only if icurr = 4 as well...
diff --git a/tests/unit/test_physics.py b/tests/unit/test_physics.py
index dfc8b50251..d569b594c3 100644
--- a/tests/unit/test_physics.py
+++ b/tests/unit/test_physics.py
@@ -642,6 +642,7 @@ def test_culcur(culcurparam, monkeypatch, physics):
             {
                 "qbar": 2.5,
                 "aspect": 2.7,
+                "eps": 0.37037037,
                 "rminor": 1.5,
                 "bt": 12,
                 "kappa": 1.85,
@@ -653,6 +654,7 @@ def test_culcur(culcurparam, monkeypatch, physics):
             {
                 "qbar": 2.5,
                 "aspect": 3.0,
+                "eps": 0.33333333,
                 "rminor": 1.5,
                 "bt": 12,
                 "kappa": 1.85,
@@ -675,6 +677,7 @@ def test_plasc(arguments, expected):
                 "ip": 1.6e7,
                 "qbar": 2.5,
                 "aspect": 2.7,
+                "eps": 0.37037037,
                 "bt": 12,
                 "kappa": 1.85,
                 "delta": 0.5,
@@ -689,6 +692,7 @@ def test_plasc(arguments, expected):
                 "ip": 1.6e7,
                 "qbar": 2.5,
                 "aspect": 3.0,
+                "eps": 0.33333333,
                 "bt": 12,
                 "kappa": 1.85,
                 "delta": 0.5,
@@ -703,6 +707,7 @@ def test_plasc(arguments, expected):
                 "ip": 1.6e7,
                 "qbar": 2.5,
                 "aspect": 3.0,
+                "eps": 0.33333333,
                 "bt": 12,
                 "kappa": 1.85,
                 "delta": 0.5,