diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index cba41023..40a6f37b 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -21,12 +21,10 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include "backend/drm/drm.h"
+#include "backend/drm/iface.h"
 #include "backend/drm/util.h"
 
 bool wlr_drm_check_features(struct wlr_drm_backend *backend) {
-	extern const struct wlr_drm_interface iface_legacy;
-	extern const struct wlr_drm_interface iface_atomic;
-
 	if (drmSetClientCap(backend->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) {
 		wlr_log(L_ERROR, "DRM universal planes unsupported");
 		return false;
diff --git a/backend/drm/iface_atomic.c b/backend/drm/iface_atomic.c
index 5bb2da9b..75a3c33a 100644
--- a/backend/drm/iface_atomic.c
+++ b/backend/drm/iface_atomic.c
@@ -3,6 +3,7 @@
 #include <xf86drmMode.h>
 #include <wlr/util/log.h>
 #include "backend/drm/drm.h"
+#include "backend/drm/iface.h"
 #include "backend/drm/util.h"
 
 struct atomic {
diff --git a/backend/drm/iface_legacy.c b/backend/drm/iface_legacy.c
index 856e9060..110b38b5 100644
--- a/backend/drm/iface_legacy.c
+++ b/backend/drm/iface_legacy.c
@@ -3,6 +3,7 @@
 #include <xf86drmMode.h>
 #include <wlr/util/log.h>
 #include "backend/drm/drm.h"
+#include "backend/drm/iface.h"
 #include "backend/drm/util.h"
 
 static bool legacy_crtc_pageflip(struct wlr_drm_backend *backend,
diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
index 43838495..c57493f3 100644
--- a/include/backend/drm/drm.h
+++ b/include/backend/drm/drm.h
@@ -15,6 +15,7 @@
 #include <wlr/egl.h>
 #include <wlr/util/list.h>
 
+#include "iface.h"
 #include "properties.h"
 
 struct wlr_drm_plane {
@@ -156,23 +157,6 @@ struct wlr_drm_output {
 	struct wl_event_source *retry_pageflip;
 };
 
-// Used to provide atomic or legacy DRM functions
-struct wlr_drm_interface {
-	// Enable or disable DPMS for output
-	void (*conn_enable)(struct wlr_drm_backend *backend,
-			struct wlr_drm_output *output, bool enable);
-	// Pageflip on crtc. If mode is non-NULL perform a full modeset using it.
-	bool (*crtc_pageflip)(struct wlr_drm_backend *backend,
-			struct wlr_drm_output *output, struct wlr_drm_crtc *crtc,
-			uint32_t fb_id, drmModeModeInfo *mode);
-	// Enable the cursor buffer on crtc. Set bo to NULL to disable
-	bool (*crtc_set_cursor)(struct wlr_drm_backend *backend,
-			struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
-	// Move the cursor on crtc
-	bool (*crtc_move_cursor)(struct wlr_drm_backend *backend,
-			struct wlr_drm_crtc *crtc, int x, int y);
-};
-
 bool wlr_drm_check_features(struct wlr_drm_backend *drm);
 bool wlr_drm_resources_init(struct wlr_drm_backend *drm);
 void wlr_drm_resources_free(struct wlr_drm_backend *drm);
diff --git a/include/backend/drm/iface.h b/include/backend/drm/iface.h
new file mode 100644
index 00000000..cf77f4d4
--- /dev/null
+++ b/include/backend/drm/iface.h
@@ -0,0 +1,35 @@
+#ifndef BACKEND_DRM_IFACE_H
+#define BACKEND_DRM_IFACE_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <gbm.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+struct wlr_drm_backend;
+struct wlr_drm_output;
+struct wlr_drm_crtc;
+
+// Used to provide atomic or legacy DRM functions
+struct wlr_drm_interface {
+	// Enable or disable DPMS for output
+	void (*conn_enable)(struct wlr_drm_backend *backend,
+			struct wlr_drm_output *output, bool enable);
+	// Pageflip on crtc. If mode is non-NULL perform a full modeset using it.
+	bool (*crtc_pageflip)(struct wlr_drm_backend *backend,
+			struct wlr_drm_output *output, struct wlr_drm_crtc *crtc,
+			uint32_t fb_id, drmModeModeInfo *mode);
+	// Enable the cursor buffer on crtc. Set bo to NULL to disable
+	bool (*crtc_set_cursor)(struct wlr_drm_backend *backend,
+			struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
+	// Move the cursor on crtc
+	bool (*crtc_move_cursor)(struct wlr_drm_backend *backend,
+			struct wlr_drm_crtc *crtc, int x, int y);
+};
+
+extern const struct wlr_drm_interface iface_atomic;
+extern const struct wlr_drm_interface iface_legacy;
+
+#endif