diff --git a/compat.h b/compat.h
index bdf1eef..7d3f331 100644
--- a/compat.h
+++ b/compat.h
@@ -83,6 +83,13 @@
 # define strlcpy strscpy
 #endif
 
+/* proc_handler's table argument was constified in 6.11 (commit 78eb4ea25cd5). */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6,11,0)
+# define CONST_CTL const
+#else
+# define CONST_CTL
+#endif
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
 # define compat_hlist_for_each_entry			hlist_for_each_entry
 # define compat_hlist_for_each_entry_safe		hlist_for_each_entry_safe
diff --git a/pkt_netflow.c b/pkt_netflow.c
index a06dbc6..f5a2f12 100644
--- a/pkt_netflow.c
+++ b/pkt_netflow.c
@@ -1434,7 +1434,7 @@ unlock:
 
 #ifdef CONFIG_SYSCTL
 /* sysctl /proc/sys/net/netflow */
-static int hsize_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int hsize_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret, hsize;
@@ -1451,7 +1451,7 @@ static int hsize_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp
 		return ret;
 }
 
-static int sndbuf_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int sndbuf_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;
@@ -1486,7 +1486,7 @@ static int sndbuf_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *fil
 }
 
 static void free_templates(void);
-static int destination_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int destination_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;
@@ -1503,7 +1503,7 @@ static int destination_procctl(ctl_table *ctl, int write, BEFORE2632(struct file
 }
 
 #ifdef ENABLE_AGGR
-static int aggregation_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int aggregation_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;
@@ -1517,7 +1517,7 @@ static int aggregation_procctl(ctl_table *ctl, int write, BEFORE2632(struct file
 }
 #endif
 
-static int promisc_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int promisc_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int newpromisc = promisc;
@@ -1533,7 +1533,7 @@ static int promisc_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *fi
 
 #ifdef ENABLE_SAMPLER
 static int parse_sampler(char *ptr);
-static int sampler_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int sampler_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;
@@ -1566,7 +1566,7 @@ static int sampler_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *fi
 
 #ifdef SNMP_RULES
 static int add_snmp_rules(char *ptr);
-static int snmp_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int snmp_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
        int ret;
@@ -1597,7 +1597,7 @@ static void netflow_export_flow_dummy(struct pkt_netflow *nf)
 	pkt_netflow_free(nf);
 }
 
-static int flush_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int flush_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;
@@ -1633,7 +1633,7 @@ static int flush_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp
 	return ret;
 }
 
-static int protocol_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
+static int protocol_procctl(CONST_CTL ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
 			 void __user *buffer, size_t *lenp, loff_t *fpos)
 {
 	int ret;