diff --git a/simpegEM/FDEM/FDEM.py b/simpegEM/FDEM/FDEM.py
index 7213f81f..3381a6ab 100644
--- a/simpegEM/FDEM/FDEM.py
+++ b/simpegEM/FDEM/FDEM.py
@@ -144,7 +144,7 @@ class ProblemFDEM_e(BaseFDEMProblem):
     def getADeriv(self, freq, u, v, adjoint=False):
         sig = self.curModel.transform
         dsig_dm = self.curModel.transformDeriv
-        dMe_dsig = self.mesh.getEdgeInnerProductDeriv(self.tensorType)(u)
+        dMe_dsig = self.mesh.getEdgeInnerProductDeriv(sig)(u)
 
         if adjoint:
             return 1j * omega(freq) * ( dsig_dm.T * ( dMe_dsig.T * v ) )
@@ -228,7 +228,7 @@ class ProblemFDEM_b(BaseFDEMProblem):
         dMeSigmaI_dI = - self.MeSigmaI**2
 
         vec = (C.T*(mui*u))
-        dMe_dsig = self.mesh.getEdgeInnerProductDeriv(self.tensorType)(vec)
+        dMe_dsig = self.mesh.getEdgeInnerProductDeriv(sig)(vec)
 
         if adjoint:
             return dsig_dm.T * ( dMe_dsig.T * ( dMeSigmaI_dI.T * ( C.T * ( mui.T * v ) ) ) )
@@ -285,7 +285,7 @@ class ProblemFDEM_b(BaseFDEMProblem):
             dMeSigmaI_dI = - self.MeSigmaI**2
 
             vec = C.T * ( mui * b )
-            dMe_dsig = self.mesh.getEdgeInnerProductDeriv(self.tensorType)(vec)
+            dMe_dsig = self.mesh.getEdgeInnerProductDeriv(sig)(vec)
             if not adjoint:
                 return dMeSigmaI_dI * ( dMe_dsig * ( dsig_dm * v ) )
             else:
diff --git a/simpegEM/TDEM/TDEM_b.py b/simpegEM/TDEM/TDEM_b.py
index ed4d3f3f..ccaff98c 100644
--- a/simpegEM/TDEM/TDEM_b.py
+++ b/simpegEM/TDEM/TDEM_b.py
@@ -106,7 +106,7 @@ class ProblemTDEM_b(BaseTDEMProblem):
 
         # fake initial 'e' fields
         p[:, 'e', 0] = 0.0
-        dMdsig = self.mesh.getEdgeInnerProductDeriv(self.tensorType)
+        dMdsig = self.mesh.getEdgeInnerProductDeriv(self.curModel.transform)
         dsigdm_x_v = self.curModel.transformDeriv*vec
         for i in range(1,self.nT+1):
             # TODO: G[1] may be dependent on the model
@@ -130,7 +130,7 @@ class ProblemTDEM_b(BaseTDEMProblem):
         if u is None:
             u = self.fields(m)
         self.curModel = m
-        dMdsig = self.mesh.getEdgeInnerProductDeriv(self.tensorType)
+        dMdsig = self.mesh.getEdgeInnerProductDeriv(self.curModel.transform)
         dsigdm = self.curModel.transformDeriv
 
         nTx = self.survey.nTx