diff --git a/Schemas/NeuroML2/NeuroML_v2.3.1.xsd b/Schemas/NeuroML2/NeuroML_v2.3.1.xsd
index 877edef..741f1e8 100644
--- a/Schemas/NeuroML2/NeuroML_v2.3.1.xsd
+++ b/Schemas/NeuroML2/NeuroML_v2.3.1.xsd
@@ -2118,8 +2118,8 @@
           <xs:element name="channelDensityNonUniformNernst" type="ChannelDensityNonUniformNernst" minOccurs="0" maxOccurs="unbounded"/>
           <xs:element name="channelDensityNonUniformGHK" type="ChannelDensityNonUniformGHK" minOccurs="0" maxOccurs="unbounded"/>
           <xs:element name="spikeThresh" type="SpikeThresh" minOccurs="1" maxOccurs="unbounded"/>
-          <xs:element name="specificCapacitance" type="SpecificCapacitance" minOccurs="0" maxOccurs="unbounded"/>
-          <xs:element name="initMembPotential" type="InitMembPotential" minOccurs="0" maxOccurs="unbounded"/>
+          <xs:element name="specificCapacitance" type="SpecificCapacitance" minOccurs="1" maxOccurs="unbounded"/>
+          <xs:element name="initMembPotential" type="InitMembPotential" minOccurs="1" maxOccurs="unbounded"/>
           <!-- Taking this out until confirmation it's needed
                 <xs:element name="reversalPotential" type="ReversalPotential" minOccurs="0" maxOccurs="unbounded"/>-->
         </xs:sequence>
diff --git a/examples/NML2_FullCell.nml b/examples/NML2_FullCell.nml
index cc6fc5b..51b0288 100644
--- a/examples/NML2_FullCell.nml
+++ b/examples/NML2_FullCell.nml
@@ -94,6 +94,8 @@
 
                 <specificCapacitance segmentGroup="dendrite_group" value="2.0 uF_per_cm2"/>
 
+                <initMembPotential value="-65mV"/>
+
             </membraneProperties>
 
             <intracellularProperties>
diff --git a/examples/NML2_FullNeuroML.nml b/examples/NML2_FullNeuroML.nml
index b44f4b3..32fb42c 100644
--- a/examples/NML2_FullNeuroML.nml
+++ b/examples/NML2_FullNeuroML.nml
@@ -67,6 +67,8 @@
                             erev="50mV"/>  <!-- Temporarily specifying erev in the channelDensity element-->
 
             <spikeThresh value="0mV"/>
+            <specificCapacitance segmentGroup="soma_group" value="1.0 uF_per_cm2"/>
+            <initMembPotential value="-65mV"/>
 
         </membraneProperties>
 
diff --git a/examples/NML2_InhomogeneousParams.nml b/examples/NML2_InhomogeneousParams.nml
index 85f8ac9..5703d38 100644
--- a/examples/NML2_InhomogeneousParams.nml
+++ b/examples/NML2_InhomogeneousParams.nml
@@ -74,6 +74,8 @@
                 <spikeThresh value="0mV"/>
 
                 <specificCapacitance segmentGroup="soma_group" value="1.0 uF_per_cm2"/>
+                
+                <initMembPotential value="-65mV"/>
             </membraneProperties>
 
             <intracellularProperties>