diff --git a/opencl_fdfd/kernels/common.cl b/opencl_fdfd/kernels/common.cl
index d429089..41e811f 100644
--- a/opencl_fdfd/kernels/common.cl
+++ b/opencl_fdfd/kernels/common.cl
@@ -1,21 +1,13 @@
 /* Common code for E, H updates
  *
  * Template parameters:
- *  ctype       string denoting type for storing complex field values
  *  shape       list of 3 ints specifying shape of fields
  */
 
-//Defines to clean up operation names
-#define ctype {{ctype}}_t
-#define zero {{ctype}}_new(0.0, 0.0)
-#define add {{ctype}}_add
-#define sub {{ctype}}_sub
-#define mul {{ctype}}_mul
-
 // Field sizes
-const int sx = {shape[0]};
-const int sy = {shape[1]};
-const int sz = {shape[2]};
+const int sx = {{shape[0]}};
+const int sy = {{shape[1]}};
+const int sz = {{shape[2]}};
 
 //Since we use i to index into Ex[], E[], ... rather than E[], do nothing if
 // i is outside the bounds of Ex[].
diff --git a/opencl_fdfd/kernels/e2h.cl b/opencl_fdfd/kernels/e2h.cl
index 0332252..8e2a076 100644
--- a/opencl_fdfd/kernels/e2h.cl
+++ b/opencl_fdfd/kernels/e2h.cl
@@ -23,9 +23,9 @@ __global ctype *inv_mu_x = inv_mu + XX;
 __global ctype *inv_mu_y = inv_mu + YY;
 __global ctype *inv_mu_z = inv_mu + ZZ;
 
-__global ctype *pmc_x = pmc + XX;
-__global ctype *pmc_y = pmc + YY;
-__global ctype *pmc_z = pmc + ZZ;
+__global char *pmc_x = pmc + XX;
+__global char *pmc_y = pmc + YY;
+__global char *pmc_z = pmc + ZZ;
 
 /*
  * Implement periodic boundary conditions
diff --git a/opencl_fdfd/kernels/h2e.cl b/opencl_fdfd/kernels/h2e.cl
index 9c51a25..d71a78c 100644
--- a/opencl_fdfd/kernels/h2e.cl
+++ b/opencl_fdfd/kernels/h2e.cl
@@ -24,9 +24,9 @@ __global ctype *oeps_x = oeps + XX;
 __global ctype *oeps_y = oeps + YY;
 __global ctype *oeps_z = oeps + ZZ;
 
-__global ctype *pec_x = pec + XX;
-__global ctype *pec_y = pec + YY;
-__global ctype *pec_z = pec + ZZ;
+__global char *pec_x = pec + XX;
+__global char *pec_y = pec + YY;
+__global char *pec_z = pec + ZZ;
 
 __global ctype *Pl_x = Pl + XX;
 __global ctype *Pl_y = Pl + YY;
diff --git a/opencl_fdfd/kernels/p2e.cl b/opencl_fdfd/kernels/p2e.cl
index ba2c87e..20792cd 100644
--- a/opencl_fdfd/kernels/p2e.cl
+++ b/opencl_fdfd/kernels/p2e.cl
@@ -2,7 +2,6 @@
  * Apply PEC and preconditioner.
  *
  * Template parameters:
- *  ctype       name of complex type (eg. cdouble)
  *  pec         false iff no PEC anyhwere
  *
  * Arguments:
@@ -13,12 +12,6 @@
  */
 
 
-//Defines to clean up operation names
-#define ctype {{ctype}}_t
-#define zero {{ctype}}_new(0.0, 0.0)
-#define mul {{ctype}}_mul
-
-
 {%- if pec -%}
 if (pec[i] != 0) {
     E[i] = zero;
diff --git a/opencl_fdfd/ops.py b/opencl_fdfd/ops.py
index 108201b..f0b5433 100644
--- a/opencl_fdfd/ops.py
+++ b/opencl_fdfd/ops.py
@@ -28,14 +28,20 @@ def type_to_C(float_type: numpy.float32 or numpy.float64) -> str:
 
     return types[float_type]
 
+ctype = type_to_C(numpy.complex128)
+ctype_bare = 'cdouble'
 
 preamble = '''
 #define PYOPENCL_DEFINE_CDOUBLE
 #include <pyopencl-complex.h>
 
-'''
-
-ctype = type_to_C(numpy.complex128)
+//Defines to clean up operation and type names
+#define ctype {ctype}_t
+#define zero {ctype}_new(0.0, 0.0)
+#define add {ctype}_add
+#define sub {ctype}_sub
+#define mul {ctype}_mul
+'''.format(ctype=ctype_bare)
 
 
 def ptrs(*args):
@@ -44,16 +50,14 @@ def ptrs(*args):
 
 def create_a(context, shape, mu=False, pec=False, pmc=False):
 
-    common_source = jinja_env.get_template('common.cl').render(shape=shape,
-                                                               ctype=ctype)
+    common_source = jinja_env.get_template('common.cl').render(shape=shape)
 
     pec_arg = ['char *pec']
     pmc_arg = ['char *pmc']
     des = [ctype + ' *inv_de' + a for a in 'xyz']
     dhs = [ctype + ' *inv_dh' + a for a in 'xyz']
 
-    p2e_source = jinja_env.get_template('p2e.cl').render(pec=pec,
-                                                         ctype=ctype)
+    p2e_source = jinja_env.get_template('p2e.cl').render(pec=pec)
     P2E_kernel = ElementwiseKernel(context,
                                    name='P2E',
                                    preamble=preamble,