diff --git a/includes/definitions/linux.yaml b/includes/definitions/linux.yaml
index d7b8683..a72ce03 100644
--- a/includes/definitions/linux.yaml
+++ b/includes/definitions/linux.yaml
@@ -6,6 +6,7 @@ ifXmcbc: 1
 ifname: 1
 mib_dir:
     - supermicro
+    - dell
 over:
     - { graph: device_processor, text: 'Processor Usage' }
     - { graph: device_ucd_memory, text: 'Memory Usage' }
diff --git a/includes/definitions/windows.yaml b/includes/definitions/windows.yaml
index b588288..e111967 100644
--- a/includes/definitions/windows.yaml
+++ b/includes/definitions/windows.yaml
@@ -3,6 +3,8 @@ type: server
 text: 'Microsoft Windows'
 ifname: 1
 processor_stacked: 1
+mib_dir:
+    - dell
 bad_hrSystemUptime: true
 discovery:
     - sysObjectId: .1.3.6.1.4.1.311.1.1.3
     - sysDescr: Windows