diff --git a/system/generic/README.md b/system/generic/README.md
index ea6c8d4..b812152 100644
--- a/system/generic/README.md
+++ b/system/generic/README.md
@@ -84,6 +84,7 @@ Creates DataDog monitors with the following checks:
 | new_host_delay | Delay in seconds before monitor new resource | string | `300` | no |
 | unreachable_extra_tags | Extra tags for Host unreachable monitor | list | `<list>` | no |
 | unreachable_message | Custom message for Host unreachable monitor | string | `` | no |
+| unreachable_no_data_timeframe | Timeframe for Host unreachable monitor to alert on no data | string | `2` | no |
 | unreachable_silenced | Groups to mute for Host unreachable monitor | map | `<map>` | no |
 
 ## Outputs
diff --git a/system/generic/inputs.tf b/system/generic/inputs.tf
index 249a6b7..c67016d 100644
--- a/system/generic/inputs.tf
+++ b/system/generic/inputs.tf
@@ -49,6 +49,12 @@ variable "unreachable_message" {
   default     = ""
 }
 
+variable "unreachable_no_data_timeframe" {
+  description = "Timeframe for Host unreachable monitor to alert on no data"
+  type        = "string"
+  default     = 2
+}
+
 variable "cpu_high_silenced" {
   description = "Groups to mute for CPU high monitor"
   type        = "map"
diff --git a/system/generic/monitors-system.tf b/system/generic/monitors-system.tf
index f113d8d..ecbe419 100644
--- a/system/generic/monitors-system.tf
+++ b/system/generic/monitors-system.tf
@@ -19,6 +19,7 @@ resource "datadog_monitor" "datadog_host_unreachable" {
   include_tags        = true
   locked              = false
   require_full_window = true
+  no_data_timeframe   = "${var.unreachable_no_data_timeframe}"
 
   silenced = "${var.unreachable_silenced}"