diff --git a/CHANGELOG b/CHANGELOG
index 47ebbe1cf7..1a74403f36 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Add button to process requisition
+
 Version 5.4.0 - 2019-11-04
 * Bug fixes (see mercurial logs for details)
 * Remove domain constraint on unit
diff --git a/purchase.py b/purchase.py
index e049578d9a..8564882206 100644
--- a/purchase.py
+++ b/purchase.py
@@ -189,6 +189,13 @@ class PurchaseRequisition(Workflow, ModelSQL, ModelView):
                     'invisible': Eval('state') != 'waiting',
                     'depends': ['state'],
                     },
+                'process': {
+                    'invisible': ~Eval('state').in_(
+                        ['approved', 'processing']),
+                    'icon': If(Eval('state') == 'approved',
+                        'tryton-forward', 'tryton-refresh'),
+                    'depends': ['state'],
+                    },
                 'reject': {
                     'invisible': Eval('state') != 'waiting',
                     'depends': ['state'],
@@ -382,6 +389,7 @@ class PurchaseRequisition(Workflow, ModelSQL, ModelView):
         pass
 
     @classmethod
+    @ModelView.button
     def process(cls, requisitions):
         done = []
         process = []
diff --git a/purchase.xml b/purchase.xml
index 30f230ed53..91e09a55b5 100644
--- a/purchase.xml
+++ b/purchase.xml
@@ -209,6 +209,16 @@ this repository contains the full copyright notices and license terms.
             <field name="group" ref="group_purchase_requisition_approval"/>
         </record>
 
+        <record model="ir.model.button" id="requisition_process_button">
+            <field name="name">process</field>
+            <field name="string">Process</field>
+            <field name="model" search="[('model', '=', 'purchase.requisition')]"/>
+        </record>
+        <record model="ir.model.button-res.group" id="requisition_process_button_group_purchase_requisition_approval">
+            <field name="button" ref="requisition_process_button"/>
+            <field name="group" ref="group_purchase_requisition_approval"/>
+        </record>
+
         <record model="ir.model.button" id="requisition_reject_button">
             <field name="name">reject</field>
             <field name="string">Reject</field>
diff --git a/view/purchase_requisition_form.xml b/view/purchase_requisition_form.xml
index 330020c7a2..f06ec01627 100644
--- a/view/purchase_requisition_form.xml
+++ b/view/purchase_requisition_form.xml
@@ -38,5 +38,6 @@ this repository contains the full copyright notices and license terms. -->
         <button name="draft"/>
         <button name="wait" icon="tryton-forward"/>
         <button name="approve" icon="tryton-ok"/>
+        <button name="process"/>
     </group>
 </form>