diff --git a/interfaces/cython/cantera/onedim.py b/interfaces/cython/cantera/onedim.py
index 2c9af341d..daa35ee0a 100644
--- a/interfaces/cython/cantera/onedim.py
+++ b/interfaces/cython/cantera/onedim.py
@@ -609,7 +609,7 @@ class IonFlameBase(FlameBase):
         return self.profile(self.flame, 'eField')
 
     def solve(self, loglevel=1, refine_grid=True, auto=False, stage=1, enable_energy=True):
-        self.flame.set_solvingStage(stage)
+        self.flame.set_solving_stage(stage)
         if stage == 1:
             super(IonFlameBase, self).solve(loglevel, refine_grid, auto)
         if stage == 2:
diff --git a/interfaces/cython/cantera/onedim.pyx b/interfaces/cython/cantera/onedim.pyx
index 1080078a4..e3a3f48bd 100644
--- a/interfaces/cython/cantera/onedim.pyx
+++ b/interfaces/cython/cantera/onedim.pyx
@@ -563,7 +563,7 @@ cdef class IonFlow(_FlowBase):
         gas = getIdealGasPhase(thermo)
         self.flow = <CxxStFlow*>(new CxxIonFlow(gas, thermo.n_species, 2))
 
-    def set_solvingStage(self, stage):
+    def set_solving_stage(self, stage):
         (<CxxIonFlow*>self.flow).setSolvingStage(stage)
 
     property electric_field_enabled: