diff --git a/charts/s3proxy/templates/configmap.yaml b/charts/s3proxy/templates/configmap.yaml
index a03fb8f..ce6e64b 100644
--- a/charts/s3proxy/templates/configmap.yaml
+++ b/charts/s3proxy/templates/configmap.yaml
@@ -142,6 +142,11 @@ data:
   {{- if or .Values.config.backends.azureblob.endpoint .Values.config.backends.azureblob.account }}
     jclouds.endpoint={{ .Values.config.backends.azureblob.endpoint | default (printf "https://%s.blob.core.windows.net" .Values.config.backends.azureblob.account) }}
   {{- end }}
+  {{- if .Values.config.backends.azureblob.regions }}
+    # Required by the azureblob-sdk provider on real Azure to create buckets
+    # (otherwise "no jclouds.regions configured" -> InvalidLocationConstraint).
+    jclouds.regions={{ .Values.config.backends.azureblob.regions }}
+  {{- end }}
   {{- if .Values.config.backends.azureblob.account }}
     jclouds.identity={{ .Values.config.backends.azureblob.account }}
   {{- end }}
diff --git a/charts/s3proxy/values.yaml b/charts/s3proxy/values.yaml
index d3b111c..f2eaa36 100644
--- a/charts/s3proxy/values.yaml
+++ b/charts/s3proxy/values.yaml
@@ -226,6 +226,8 @@ config:
       # -- (string) Azure endpoint
       # @default -- `https://{{ .Values.config.backends.azureblob.account }}.blob.core.windows.net`
       endpoint:
+      # -- jclouds region(s) for the backend, emitted as `jclouds.regions=`. The azureblob-sdk provider requires this on real Azure to create buckets (without it `aws s3 mb` fails with InvalidLocationConstraint / "no jclouds.regions configured"). Comma-separated for multiple. Not needed against Azurite. Leave empty to omit.
+      regions: ""
       # -- SAS token configuration
       sasToken:
         # -- SAS token value