diff --git a/plugins/modules/gcp_compute_firewall.py b/plugins/modules/gcp_compute_firewall.py
index a0bae8d9d..b0e5e5b1e 100644
--- a/plugins/modules/gcp_compute_firewall.py
+++ b/plugins/modules/gcp_compute_firewall.py
@@ -67,8 +67,8 @@
         description:
         - The IP protocol to which this rule applies. The protocol type is required
           when creating a firewall rule. This value can either be one of the following
-          well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP protocol
-          number.
+          well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or the
+          IP protocol number.
         required: true
         type: str
       ports:
@@ -94,8 +94,8 @@
         description:
         - The IP protocol to which this rule applies. The protocol type is required
           when creating a firewall rule. This value can either be one of the following
-          well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP protocol
-          number.
+          well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or the
+          IP protocol number.
         required: true
         type: str
       ports:
@@ -336,8 +336,8 @@
       description:
       - The IP protocol to which this rule applies. The protocol type is required
         when creating a firewall rule. This value can either be one of the following
-        well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP protocol
-        number.
+        well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or the
+        IP protocol number.
       returned: success
       type: str
     ports:
@@ -364,8 +364,8 @@
       description:
       - The IP protocol to which this rule applies. The protocol type is required
         when creating a firewall rule. This value can either be one of the following
-        well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP protocol
-        number.
+        well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or the
+        IP protocol number.
       returned: success
       type: str
     ports:
diff --git a/plugins/modules/gcp_compute_firewall_info.py b/plugins/modules/gcp_compute_firewall_info.py
index cdd088f74..fce77a717 100644
--- a/plugins/modules/gcp_compute_firewall_info.py
+++ b/plugins/modules/gcp_compute_firewall_info.py
@@ -123,8 +123,8 @@
           description:
           - The IP protocol to which this rule applies. The protocol type is required
             when creating a firewall rule. This value can either be one of the following
-            well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP
-            protocol number.
+            well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or
+            the IP protocol number.
           returned: success
           type: str
         ports:
@@ -152,8 +152,8 @@
           description:
           - The IP protocol to which this rule applies. The protocol type is required
             when creating a firewall rule. This value can either be one of the following
-            well known protocol strings (tcp, udp, icmp, esp, ah, sctp), or the IP
-            protocol number.
+            well known protocol strings (tcp, udp, icmp, esp, ah, sctp, ipip), or
+            the IP protocol number.
           returned: success
           type: str
         ports: