diff --git a/samples/net/syslog_net/prj.conf b/samples/net/syslog_net/prj.conf
index 890138056f5..e2564737b8c 100644
--- a/samples/net/syslog_net/prj.conf
+++ b/samples/net/syslog_net/prj.conf
@@ -14,6 +14,11 @@ CONFIG_NET_IF_MCAST_IPV6_ADDR_COUNT=5
 CONFIG_NET_LOG=y
 CONFIG_LOG=y
 
+# Immediate logging does not work with network syslog as it would cause
+# the sent packet to be malformed (contains only 1 byte data)
+CONFIG_LOG_IMMEDIATE=n
+CONFIG_LOG_PROCESS_THREAD=y
+
 CONFIG_NET_IPV6=y
 CONFIG_NET_IPV4=y
 CONFIG_NET_DHCPV4=n
diff --git a/samples/net/syslog_net/src/main.c b/samples/net/syslog_net/src/main.c
index 60848e8b003..2edb50ca1af 100644
--- a/samples/net/syslog_net/src/main.c
+++ b/samples/net/syslog_net/src/main.c
@@ -12,6 +12,8 @@ LOG_MODULE_REGISTER(net_syslog, LOG_LEVEL_DBG);
 #include <net/net_core.h>
 #include <net/net_pkt.h>
 
+BUILD_ASSERT(IS_ENABLED(CONFIG_LOG_BACKEND_NET), "syslog backend not enabled");
+
 #define SLEEP_BETWEEN_PRINTS 3
 
 void main(void)
diff --git a/subsys/logging/Kconfig b/subsys/logging/Kconfig
index 22d6acce787..e9a3880e3ac 100644
--- a/subsys/logging/Kconfig
+++ b/subsys/logging/Kconfig
@@ -465,9 +465,11 @@ config LOG_BACKEND_XTENSA_OUTPUT_BUFFER_SIZE
 	  Buffer is used by log_output module for preparing output data (e.g.
 	  string formatting).
 
+# Immediate mode cannot be used with network backend as it would cause the sent
+# rsyslog message to be malformed.
 config LOG_BACKEND_NET
 	bool "Enable networking backend"
-	depends on NETWORKING
+	depends on NETWORKING && NET_UDP && !LOG_IMMEDIATE
 	select NET_CONTEXT_NET_PKT_POOL
 	help
 	  Send syslog messages to network server.