diff --git a/sway/commands/output/transform.c b/sway/commands/output/transform.c
index f4fcc8c9..8db71bb3 100644
--- a/sway/commands/output/transform.c
+++ b/sway/commands/output/transform.c
@@ -1,4 +1,5 @@
 #include <string.h>
+#include <wlr/util/transform.h>
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "log.h"
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index e02ab32d..d9328701 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -16,6 +16,7 @@
 #include <wlr/types/wlr_presentation_time.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/util/region.h>
+#include <wlr/util/transform.h>
 #include "config.h"
 #include "log.h"
 #include "sway/config.h"
diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index c4c0004e..9cfdea84 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -13,6 +13,7 @@
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/util/region.h>
+#include <wlr/util/transform.h>
 #include "log.h"
 #include "config.h"
 #include "sway/config.h"
diff --git a/sway/tree/root.c b/sway/tree/root.c
index 831c75a5..66008d30 100644
--- a/sway/tree/root.c
+++ b/sway/tree/root.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/util/transform.h>
 #include "sway/desktop/transaction.h"
 #include "sway/input/seat.h"
 #include "sway/ipc-server.h"