diff --git a/changelogs/fragments/626-ec2_vol-iops-when-source-does-not-have-iops.yml b/changelogs/fragments/626-ec2_vol-iops-when-source-does-not-have-iops.yml
new file mode 100644
index 00000000000..6c518b6b932
--- /dev/null
+++ b/changelogs/fragments/626-ec2_vol-iops-when-source-does-not-have-iops.yml
@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - ec2_vol - changing a volume from a type that does not support IOPS (like ``standard``) to a type that does (like ``gp3``) fails (https://github.com/ansible-collections/amazon.aws/issues/626).
diff --git a/plugins/modules/ec2_vol.py b/plugins/modules/ec2_vol.py
index 03f7d3e29cc..30b685c88d4 100644
--- a/plugins/modules/ec2_vol.py
+++ b/plugins/modules/ec2_vol.py
@@ -379,8 +379,8 @@ def update_volume(module, ec2_conn, volume):
 
         iops_changed = False
         target_iops = module.params.get('iops')
+        original_iops = volume.get('iops')
         if target_iops:
-            original_iops = volume['iops']
             if target_iops != original_iops:
                 iops_changed = True
                 req_obj['Iops'] = target_iops
@@ -392,7 +392,7 @@ def update_volume(module, ec2_conn, volume):
             # otherwise, the default iops value is applied.
             if type_changed and target_type == 'gp3':
                 if (
-                    (volume['iops'] and (int(volume['iops']) < 3000 or int(volume['iops']) > 16000)) or not volume['iops']
+                    (original_iops and (int(original_iops) < 3000 or int(original_iops) > 16000)) or not original_iops
                 ):
                     req_obj['Iops'] = 3000
                     iops_changed = True
diff --git a/tests/integration/targets/ec2_vol/tasks/main.yml b/tests/integration/targets/ec2_vol/tasks/main.yml
index 0ebd39c5af4..d4add04cb43 100644
--- a/tests/integration/targets/ec2_vol/tasks/main.yml
+++ b/tests/integration/targets/ec2_vol/tasks/main.yml
@@ -286,7 +286,7 @@
         instance: "{{ test_instance.instance_ids[0] }}"
         device_name: /dev/sdh
         volume_size: 1
-        volume_type: gp2
+        volume_type: standard
         name: '{{ resource_prefix }} - sdh'
         tags:
           "lowercase spaced": 'hello cruel world'
@@ -316,7 +316,7 @@
         instance: "{{ test_instance.instance_ids[0] }}"
         device_name: /dev/sdh
         volume_size: 1
-        volume_type: gp2
+        volume_type: standard
         tags:
           ResourcePrefix: "{{ resource_prefix }}"
       check_mode: true
@@ -332,7 +332,7 @@
         instance: "{{ test_instance.instance_ids[0] }}"
         device_name: /dev/sdh
         volume_size: 1
-        volume_type: gp2
+        volume_type: standard
         tags:
           ResourcePrefix: "{{ resource_prefix }}"
       register: new_vol_attach_result_idem
@@ -350,7 +350,7 @@
         id: "{{ new_vol_attach_result.volume.id }}"
         device_name: /dev/sdh
         volume_size: 1
-        volume_type: gp2
+        volume_type: standard
         tags:
           "lowercase spaced": 'hello cruel world ❤️'
           "Title Case": 'Hello Cruel World ❤️'
@@ -370,7 +370,7 @@
           - "'size' in new_vol_attach_result.volume"
           - new_vol_attach_result.volume.size == 1
           - "'volume_type' in new_vol_attach_result"
-          - new_vol_attach_result.volume_type == 'gp2'
+          - new_vol_attach_result.volume_type == 'standard'
           - "'tags' in new_vol_attach_result.volume"
           - (new_vol_attach_result.volume.tags | length) == 6
           - new_vol_attach_result.volume.tags["lowercase spaced"] == 'hello cruel world ❤️'