diff --git a/cmd/podman/common/create_opts.go b/cmd/podman/common/create_opts.go
index a4f94616c7..b110b3d85e 100644
--- a/cmd/podman/common/create_opts.go
+++ b/cmd/podman/common/create_opts.go
@@ -117,7 +117,7 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, rtc *c
 		case mount.TypeTmpfs:
 			if m.TmpfsOptions != nil {
 				addField(&builder, "tmpfs-size", strconv.FormatInt(m.TmpfsOptions.SizeBytes, 10))
-				addField(&builder, "tmpfs-mode", strconv.FormatUint(uint64(m.TmpfsOptions.Mode), 10))
+				addField(&builder, "tmpfs-mode", strconv.FormatUint(uint64(m.TmpfsOptions.Mode), 8))
 			}
 		case mount.TypeVolume:
 			// All current VolumeOpts are handled above
diff --git a/test/apiv2/20-containers.at b/test/apiv2/20-containers.at
index cc5eda88e3..49f8fb3fc9 100644
--- a/test/apiv2/20-containers.at
+++ b/test/apiv2/20-containers.at
@@ -394,7 +394,8 @@ t GET containers/$cid/json 200 \
   .Config.Healthcheck.Retries=3
 
 # compat api: Test for mount options support
-payload='{"Mounts":[{"Type":"tmpfs","Target":"/mnt/scratch","TmpfsOptions":{"SizeBytes":1024,"Mode":755}}]}'
+# Sigh, JSON can't handle octal. 0755(octal) = 493(decimal)
+payload='{"Mounts":[{"Type":"tmpfs","Target":"/mnt/scratch","TmpfsOptions":{"SizeBytes":1024,"Mode":493}}]}'
 t POST containers/create Image=$IMAGE HostConfig="$payload" 201 .Id~[0-9a-f]\\{64\\}
 cid=$(jq -r '.Id' <<<"$output")
 t GET containers/$cid/json 200 \