diff --git a/Systems/a320-aerodynamics.xml b/Systems/a320-aerodynamics.xml
index 5fe8e921..a94afeb3 100644
--- a/Systems/a320-aerodynamics.xml
+++ b/Systems/a320-aerodynamics.xml
@@ -736,6 +736,24 @@
 				<value>-2.575</value>
 			</product>
 		</function>
+		
+		<function name="aero/coefficient/Cmdsp">
+			<description>Pitch moment due to symmetrical spoiler</description>
+			<product>
+				<property>aero/qbar-psf</property>
+				<property>metrics/Sw-sqft</property>
+				<property>metrics/cbarw-ft</property>
+				<table>
+					<independentVar lookup="row">aero/h_b-mac-ft</independentVar>
+					<tableData>
+						0  0.5
+						1  1.0
+					</tableData>
+				</table>
+				<toradians><property>fcs/spoiler-symmetrical-deg</property></toradians>
+				<value>0.01</value>
+			</product>
+		</function>
 	
 	</axis>
 	
diff --git a/Systems/a320-fmgc.xml b/Systems/a320-fmgc.xml
index 37617d74..135c6757 100644
--- a/Systems/a320-fmgc.xml
+++ b/Systems/a320-fmgc.xml
@@ -611,22 +611,22 @@
 		
 		<fcs_function name="/FMGC/internal/vls">
 			<function>
-				<product>
-					<max>
+				<max>
+					<product>
 						<property>/FMGC/internal/vs1g-kts</property>
-						<value>113</value>
-					</max>
-					<sum>
-						<property>/FMGC/internal/vls-factor</property>
-						<table>
-							<independentVar lookup="row">atmosphere/density-altitude</independentVar>
-							<tableData>
-								    0  0.00
-								43000  0.22
-							</tableData>
-						</table>
-					</sum>
-				</product>
+						<sum>
+							<property>/FMGC/internal/vls-factor</property>
+							<table>
+								<independentVar lookup="row">atmosphere/density-altitude</independentVar>
+								<tableData>
+										0  0.00
+									43000  0.22
+								</tableData>
+							</table>
+						</sum>
+					</product>
+					<value>113</value>
+				</max>
 			</function>
 			<clipto>
 				<min>/FMGC/internal/vs1g</min>
diff --git a/Systems/a320-spoiler.xml b/Systems/a320-spoiler.xml
index 416c8b2d..aa4c2d93 100644
--- a/Systems/a320-spoiler.xml
+++ b/Systems/a320-spoiler.xml
@@ -986,6 +986,18 @@
 				</quotient>
 			</function>
 		</fcs_function>
+		
+		<fcs_function name="fcs/spoiler-symmetrical-deg">
+			<function>
+				<quotient>
+					<min>
+						<property>fcs/spoiler-left-sum</property>
+						<property>fcs/spoiler-right-sum</property>
+					</min>
+					<value>5</value>
+				</quotient>
+			</function>
+		</fcs_function>
 	
 	</channel>