diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index d2f75f71f..281b26b37 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -2067,6 +2067,12 @@ static void handle_page_flip(int fd, unsigned seq,
 		present_flags |= WLR_OUTPUT_PRESENT_ZERO_COPY;
 	}
 
+	if (conn->output.adaptive_sync_status == WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED) {
+		present_flags |= WLR_OUTPUT_PRESENT_VARIABLE_RATE;
+	} else {
+		present_flags |= WLR_OUTPUT_PRESENT_FIXED_RATE;
+	}
+
 	struct wlr_output_event_present present_event = {
 		/* The DRM backend guarantees that the presentation event will be for
 		 * the last submitted frame. */
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index c8e44b0e6..16d6dc8a7 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -310,6 +310,10 @@ enum wlr_output_present_flag {
 	WLR_OUTPUT_PRESENT_HW_COMPLETION = 0x4,
 	// The presentation of this update was done zero-copy.
 	WLR_OUTPUT_PRESENT_ZERO_COPY = 0x8,
+	// The display hardware is operating at a fixed refresh rate.
+	WLR_OUTPUT_PRESENT_FIXED_RATE = 0x10,
+	// The display hardware is operating at a variable refresh rate.
+	WLR_OUTPUT_PRESENT_VARIABLE_RATE = 0x20,
 };
 
 struct wlr_output_event_present {
diff --git a/types/wlr_presentation_time.c b/types/wlr_presentation_time.c
index c4366f0fe..853f5ed7a 100644
--- a/types/wlr_presentation_time.c
+++ b/types/wlr_presentation_time.c
@@ -7,7 +7,7 @@
 #include <wlr/util/addon.h>
 #include "presentation-time-protocol.h"
 
-#define PRESENTATION_VERSION 2
+#define PRESENTATION_VERSION 3
 
 struct wlr_presentation_surface_state {
 	struct wlr_presentation_feedback *feedback;
@@ -293,6 +293,10 @@ static void feedback_handle_output_present(struct wl_listener *listener,
 				event.output->adaptive_sync_status == WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED) {
 			event.refresh = 0;
 		}
+		if (wl_resource_get_version(resource) < 3) {
+			event.flags &= ~WLR_OUTPUT_PRESENT_VARIABLE_RATE;
+			event.flags &= ~WLR_OUTPUT_PRESENT_FIXED_RATE;
+		}
 		if (!feedback->zero_copy) {
 			event.flags &= ~WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY;
 		}