diff --git a/render/vulkan/vulkan.c b/render/vulkan/vulkan.c
index 9454ad801..78bc25941 100644
--- a/render/vulkan/vulkan.c
+++ b/render/vulkan/vulkan.c
@@ -604,7 +604,7 @@ struct wlr_vk_device *vulkan_device_create(struct wlr_vk_instance *ini,
 		.ppEnabledExtensionNames = extensions,
 	};
 
-	assert(extensions_len < sizeof(extensions) / sizeof(extensions[0]));
+	assert(extensions_len <= sizeof(extensions) / sizeof(extensions[0]));
 
 	res = vkCreateDevice(phdev, &dev_info, NULL, &dev->dev);
 
diff --git a/xwayland/server.c b/xwayland/server.c
index 0f3956fcb..417bbe54b 100644
--- a/xwayland/server.c
+++ b/xwayland/server.c
@@ -98,7 +98,7 @@ noreturn static void exec_xwayland(struct wlr_xwayland_server *server,
 
 	argv[i++] = NULL;
 
-	assert(i < sizeof(argv) / sizeof(argv[0]));
+	assert(i <= sizeof(argv) / sizeof(argv[0]));
 
 	char wayland_socket_str[16];
 	snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", server->wl_fd[1]);