diff --git a/src/backend/drm/Renderer.cpp b/src/backend/drm/Renderer.cpp
index f873223..c6b2c90 100644
--- a/src/backend/drm/Renderer.cpp
+++ b/src/backend/drm/Renderer.cpp
@@ -3,6 +3,7 @@
 #include <xf86drmMode.h>
 #include <cstring>
 #include <fcntl.h>
+#include <unistd.h>
 #include "Math.hpp"
 #include "Shared.hpp"
 #include "FormatUtils.hpp"