diff --git a/src/libei.c b/src/libei.c
index 2c1269f..85a7495 100644
--- a/src/libei.c
+++ b/src/libei.c
@@ -222,7 +222,7 @@ connection_send_connect(struct ei *ei)
 		       ei->name ? ei->name : "unnamed"))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf) + 1));
 }
 
 static int
@@ -246,7 +246,7 @@ connection_send_add(struct ei *ei, struct ei_device *device)
 	if (!xsnprintf(buf, sizeof(buf), "add %d %d\n", device->id, device->capabilities))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf) + 1));
 }
 
 static int
@@ -260,7 +260,7 @@ connection_send_remove(struct ei *ei, struct ei_device *device)
 	if (!xsnprintf(buf, sizeof(buf), "remove %d\n", device->id))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf) + 1));
 }
 
 static int
@@ -274,7 +274,7 @@ connection_send_rel(struct ei *ei, struct ei_device *device, int32_t x, int32_t
 	if (!xsnprintf(buf, sizeof(buf), "rel %d %d %d\n", device->id, x, y))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(ei->source), buf, strlen(buf) + 1));
 }
 
 static void
diff --git a/src/libeis-client.c b/src/libeis-client.c
index 0e361e0..6419e7b 100644
--- a/src/libeis-client.c
+++ b/src/libeis-client.c
@@ -141,7 +141,7 @@ client_send_accepted(struct eis_client *client, struct eis_device *device)
 	if (!xsnprintf(buf, sizeof(buf), "accept %d\n", device->id))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(client->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(client->source), buf, strlen(buf) + 1));
 }
 
 static int
@@ -152,7 +152,7 @@ client_send_removed(struct eis_client *client, struct eis_device *device)
 	if (!xsnprintf(buf, sizeof(buf), "remove %d\n", device->id))
 		return -ENOMEM;
 
-	return min(0, xwrite(source_get_fd(client->source), buf, strlen(buf)));
+	return min(0, xwrite(source_get_fd(client->source), buf, strlen(buf) + 1));
 }
 
 _public_ void