diff --git a/src/dhcpd-pools.c b/src/dhcpd-pools.c
index 2a3f730..1f15052 100644
--- a/src/dhcpd-pools.c
+++ b/src/dhcpd-pools.c
@@ -57,7 +57,6 @@
 #include "defaults.h"
 
 /* Global variables */
-int prefix_length[2][NUM_OF_PREFIX];
 struct configuration_t config;
 struct shared_network_t *shared_networks;
 unsigned int num_shared_networks;
diff --git a/src/dhcpd-pools.h b/src/dhcpd-pools.h
index 5778666..5617477 100644
--- a/src/dhcpd-pools.h
+++ b/src/dhcpd-pools.h
@@ -244,8 +244,6 @@ struct configuration_t {
 };
 
 /* Global variables */
-/* \var prefix_length Length of each prefix.  */
-extern int prefix_length[2][NUM_OF_PREFIX];
 /* \var config Runtime configuration. */
 extern struct configuration_t config;
 /* \var shared_networks Pointer holding shared network count results. */