diff --git a/image-yaml/overcloud-hardened-images.yaml b/image-yaml/overcloud-hardened-images.yaml
index b52157611..99d5a9898 100644
--- a/image-yaml/overcloud-hardened-images.yaml
+++ b/image-yaml/overcloud-hardened-images.yaml
@@ -37,7 +37,7 @@ disk_images:
       - python-heat-agent-json-file
       - screen
     options:
-      - "--min-tmpfs 5"
+      - "--min-tmpfs=7"
     environment:
       DIB_PYTHON_VERSION: '2'
       DIB_MODPROBE_BLACKLIST: 'usb-storage cramfs freevxfs jffs2 hfs hfsplus squashfs udf vfat bluetooth'
diff --git a/image-yaml/overcloud-images.yaml b/image-yaml/overcloud-images.yaml
index 81d8e06fb..32fcdb03b 100644
--- a/image-yaml/overcloud-images.yaml
+++ b/image-yaml/overcloud-images.yaml
@@ -30,7 +30,7 @@ disk_images:
       - device-mapper-multipath
       - openstack-heat-agents
     options:
-      - "--min-tmpfs 5"
+      - "--min-tmpfs=7"
     environment:
       DIB_PYTHON_VERSION: '2'
   -
@@ -50,6 +50,6 @@ disk_images:
     packages:
       - python-hardware-detect
     options:
-      - "--min-tmpfs=5"
+      - "--min-tmpfs=7"
     environment:
       DIB_PYTHON_VERSION: '2'
diff --git a/image-yaml/overcloud-realtime-compute.yaml b/image-yaml/overcloud-realtime-compute.yaml
index 8a39dd398..e474d37f6 100644
--- a/image-yaml/overcloud-realtime-compute.yaml
+++ b/image-yaml/overcloud-realtime-compute.yaml
@@ -28,7 +28,7 @@ disk_images:
       - device-mapper-multipath
       - openstack-heat-agents
     options:
-      - "--min-tmpfs 5"
+      - "--min-tmpfs=7"
     environment:
       DIB_PYTHON_VERSION: '2'
       DIB_BAREMETAL_KERNEL_PATTERN: 'vmlinuz*.rt*'