diff --git a/pkg/kamailio/deb/bionic/kamailio.service b/pkg/kamailio/deb/bionic/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/bionic/kamailio.service
+++ b/pkg/kamailio/deb/bionic/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/buster/kamailio.service b/pkg/kamailio/deb/buster/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/buster/kamailio.service
+++ b/pkg/kamailio/deb/buster/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/debian/kamailio.service b/pkg/kamailio/deb/debian/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/debian/kamailio.service
+++ b/pkg/kamailio/deb/debian/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/jessie/kamailio.service b/pkg/kamailio/deb/jessie/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/jessie/kamailio.service
+++ b/pkg/kamailio/deb/jessie/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/sid/kamailio.service b/pkg/kamailio/deb/sid/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/sid/kamailio.service
+++ b/pkg/kamailio/deb/sid/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/stretch/kamailio.service b/pkg/kamailio/deb/stretch/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/stretch/kamailio.service
+++ b/pkg/kamailio/deb/stretch/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/deb/xenial/kamailio.service b/pkg/kamailio/deb/xenial/kamailio.service
index a411114db9e..91f804dbb9d 100644
--- a/pkg/kamailio/deb/xenial/kamailio.service
+++ b/pkg/kamailio/deb/xenial/kamailio.service
@@ -20,6 +20,8 @@ Restart=on-failure
 # /run/kamailio in tmpfs
 RuntimeDirectory=kamailio
 RuntimeDirectoryMode=0770
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target
diff --git a/pkg/kamailio/obs/kamailio.service b/pkg/kamailio/obs/kamailio.service
index c14d6cb2f28..56d8339939f 100644
--- a/pkg/kamailio/obs/kamailio.service
+++ b/pkg/kamailio/obs/kamailio.service
@@ -13,6 +13,8 @@ Environment='PKG_MEMORY=4'
 EnvironmentFile=-/etc/sysconfig/kamailio
 ExecStart=/usr/sbin/kamailio -DD -P /var/run/kamailio/kamailio.pid -f $CFGFILE -m $SHM_MEMORY -M $PKG_MEMORY
 Restart=on-failure
+# necessary for chown of control files e.g. for jsonrpcs and ctl modules
+AmbientCapabilities=CAP_CHOWN
 
 [Install]
 WantedBy=multi-user.target