diff --git a/lib/nodes/cbuilder.c b/lib/nodes/cbuilder.c
index baaab528b..7910840e1 100644
--- a/lib/nodes/cbuilder.c
+++ b/lib/nodes/cbuilder.c
@@ -124,7 +124,8 @@ static struct plugin p = {
 		.start		= cbuilder_start,
 		.stop		= cbuilder_stop,
 		.read		= cbuilder_read,
-		.write		= cbuilder_write
+		.write		= cbuilder_write,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/file.c b/lib/nodes/file.c
index ad5a4f000..3fb5a302a 100644
--- a/lib/nodes/file.c
+++ b/lib/nodes/file.c
@@ -349,6 +349,7 @@ static struct plugin p = {
 		.stop		= file_stop,
 		.read		= file_read,
 		.write		= file_write,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/fpga.c b/lib/nodes/fpga.c
index 6d931b36f..32ebd670b 100644
--- a/lib/nodes/fpga.c
+++ b/lib/nodes/fpga.c
@@ -308,7 +308,8 @@ static struct plugin p = {
 		.read		= fpga_read,
 		.write		= fpga_write,
 		.init		= fpga_init,
-		.deinit		= fpga_deinit
+		.deinit		= fpga_deinit,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/ngsi.c b/lib/nodes/ngsi.c
index a994a21d2..2f89aa87e 100644
--- a/lib/nodes/ngsi.c
+++ b/lib/nodes/ngsi.c
@@ -568,7 +568,8 @@ static struct plugin p = {
 		.read		= ngsi_read,
 		.write		= ngsi_write,
 		.init		= ngsi_init,
-		.deinit		= ngsi_deinit
+		.deinit		= ngsi_deinit,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/opal.c b/lib/nodes/opal.c
index a99c9c555..d32f8548d 100644
--- a/lib/nodes/opal.c
+++ b/lib/nodes/opal.c
@@ -290,7 +290,8 @@ static struct plugin p = {
 		.read		= opal_read,
 		.write		= opal_write,
 		.init		= opal_init,
-		.deinit		= opal_deinit
+		.deinit		= opal_deinit,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/socket.c b/lib/nodes/socket.c
index d7ffc679f..71fe94ea7 100644
--- a/lib/nodes/socket.c
+++ b/lib/nodes/socket.c
@@ -689,7 +689,8 @@ static struct plugin p = {
 		.read		= socket_read,
 		.write		= socket_write,
 		.init		= socket_init,
-		.deinit		= socket_deinit
+		.deinit		= socket_deinit,
+		.instances	= LIST_INIT()
 	}
 };
 
diff --git a/lib/nodes/websocket.c b/lib/nodes/websocket.c
index 2120fd9e3..adf33a92d 100644
--- a/lib/nodes/websocket.c
+++ b/lib/nodes/websocket.c
@@ -424,7 +424,8 @@ static struct plugin p = {
 		.read		= websocket_read,
 		.write		= websocket_write,
 		.print		= websocket_print,
-		.parse		= websocket_parse
+		.parse		= websocket_parse,
+		.instances	= LIST_INIT()
 	}
 };